Hi Vince,
These are indeed inspiring questions to inquire.
I think for me there are must be mixed motives. I would honestly want promotion and compliments here, and also get feedback to be a better composer. Also by reviewing others you learn most.
For me it's an obligation to write. If I don't write it down I will probably get depressed or repentant. There's something you must express and that's why I compose. I never compose for the sake of composing only and it never is a pastime for me. It's very challenging to write music for me and every time I have to grind it out and use 300% energy to write a passage. If I want a hobby I can just lie on my bed watching tiktoks. Composing is not enjoyable in itself but very rewarding once you finish a big task. And it's a must to write and no reason for that.
To write good music you have to have good craftsmanship and thoughts. Imitating definitely helps polish your craftsmanship. You can stay this way too if you feel OK. But for someone who aims at something original, you have to have original thoughts too and have them realized in your music originally. Musical style for me is a product of thoughts, not the other way round.
For me I don't think the music only holds relevance 200 years ago. Originality in music doesn't originate in music only but in different social, cultural, religious, philosophical context. Some of them remains new and true once created. That's what masterpiece means to be. Mozart's music is still beautiful today since he grasped some part of human soul and perfection and realises it in his music which will remain a part of human soul and culture. Other great composers do this too and have their own voices.
To have originality in your music you will have to have real original things and feelings you want to express. Some succeeds, some fails. Striving for originality and uniqueness in your music is great. But is your originality and uniqueness really meaningful and valuable to the world and human culture overall? That's something I always thinking of. If the thoughts of me is not that original, how come my voice will be unique and beneficial to others? So I strive not only to immerse in music things but also on other subjects. Can Bach write those great Cantatas had he not immersed in the Lutheran Church culture? Beethoven is described as a savage, but he read Kant. Can he write the Ninth Symphony and the Ode to Joy had he not immersed in the Enlightenment thoughts? Haydn and Mozart joined Freemasons. Felix Mendelssohn is the grandson of great philosopher Moses Mendelssohn. Mahler thought all those big questions like death and meaning and resurrection. Many of the great composers have deep thoughts in other aspects of human culture and the thoughts are expressed through their music with unique style.
To answer the relevancy question, it is to find both the universality and particularity of being in the world of 2023. We are here in the age of internet and AI, and there are numerous great composers who are out of the Austro-German tradition. The musical voice is changing drastically with much more emphasis on rhythm, tone colour, extended techniques, new sounds etc. The challenges to this particular ages we are facing are very different from what Bach and Beethoven are facing. The answer, expressed as music by composers, hence should be different. The form of expressing the different contents however, depends.
This link to the universality of being in the world of 2023. Yes the society is all different. But we are also human beings like Bach did. There is some universality as a human being even though the society is changing. Master's music are great since they successfully capture these things and have them express in music, and are echoed by us. For some, this call of originality may not be bigger than this echo from soul. Hence the music they write can just echo what they feel as right and akin to older style music. Or in a lower level it can be a habit as well, psychologically speaking.
One who strives for originality and fails can be the result of his music not echoing with the thoughts of others. Or it can just be chance. Handel and Bach's music were unbeknownst in their native country at their time; Handel got his fame in England while Bach almost none for his composition. But if your music is great enough I'm sure it finally be recognized. On the other hand, the uniqueness of some achieved is negligible since they do not answer to what we in 2023 need. I'm sure Tiktok videos are relevant to our world here, but they are meaningless and addictive. When the society changes, new expression is needed. But what expressions are needed? That remains the wisdom of composers and artists to think of. What is your towards the world now? What is your dream and ideal world? How will you express them through your music? These are questions we need to think of.
Henry