I’m happy to hear you had a good read!
I am not sure if every artist has a unique character and print. I heard plenty of people on YouTube who are technically good singers and can copy the style of internationally known artists. But if you listen to their own songs, it feels like they sing with the voice of their idols on a backing fitting to their idols. Listening to this makes me cry, because I wish I had 20% of their technical skill!
But I agree to your limitations. My songwriting uses plenty of techniques and instruments I can’t perform. But I won’t limit my ideas to my performance skills, because my gap is about 10 years of practise. It feels like wasted potential…

As a listener, I like to listen to the different recommendations that I get.
As a producer, I got the influences from my favourite artists. If I like the bass, or the drum process of a certain tune, then I try to get my sound close to that. Music is a recycle process, not only for chord progressions and melodies, but also for drums, basses, arrangements and so on.
What really makes the music sounds “different” is the personal print the artists put in their productions, the final result for the normal customer is something unique and perfect.

Limitations are basically the main issues to get up to the next level, complex songwriting, advanced sound design depend on the amount of skills and knowledge we have.

Such an interesting blog’s post!

Cheers!