Composers (and performing musicians) both create their art for all types of listeners with different musical knowledge and different seating preferences. Music is a business which needs to serve as many customers (listeners, performers, concert halls, etc.) as possible. The hall needs to be filled for maximum revenue. Even if most of the seats are unacceptable to me, someone has to sit in those seats and get some enjoyment. The general public who sits in distant locations hears the balanced, but homogenized sound. They are not detail oriented a-philes. They don't analyze the sound, but are content to enjoy the music as part of a social outing. If they are happy with that, fine. The composer wants to please these listeners.
Composers also want to please discerning musicians and a-philes like myself. Composers carefully craft the score in great detail. Composers are perfectionists who edit and revise their work out of pride in making a finished product. I have studied violin seriously my entire life with 100's of coaches and played with numerous groups, so I know the importance of precision and detail in the service of better competency in performance and learning more about the composer's similar goals.
I don't know if you have studied scores of music you know. In my experience, distant seats have no chance of capturing more than a small fraction of the detail that is in the score, which is much better captured by a close listener. The conductor is in an enviable position of hearing more of this detail and the best balance than anyone else on stage or in the audience. To see the score and hear this detail from an optimum close position has increased my appreciation of the genius of the composer. The detail oriented a-phile also puts lots of effort and money into hearing more detail which increases his appreciation of his music at home. "Wow, I never heard that detail before. This music sounds even better."
As an aside, I'm sure that if you got new eyeglasses that enabled better vision, you appreciated more details in familiar objects. More details enable more perception of beauty. Isn't it nice to find a woman's eyes beautiful at 50 feet away with better visual acuity whereas with the old glasses it was a blur and not as beautiful.