@onhwy61 You correctly admit that the conductor hears everything. Even the conductor hears more than I do from the violin section, with the best balance that he/she creates. Why should the audience be deprived of hearing all he can? Logistically and financially, most will be deprived of that. A-philes will say the 7th row is the best, but there are severe compromises in the 7th row in loss of HF and other aspects of tactility of instruments and singers. In a typical hall, I am unhappy with all but the few center seats in the 1st row. Even the 2nd row has loss of sparkle, palpability, etc. My best sonic experience as a nonmusician was in 2005 when I heard jazz at Preservation Hall in New Orleans. It wasn't a "hall" really. It was a cave with rock walls, 2 or 3 benches. The brass instruments were blasting in my face at reasonable volume levels, thrilling. The upright piano in the back of the stage, still only 10-15 feet away was jangling fun.
More generally, all musicians produce noises that are not written into the score (printed music). The skillful musician knows how to integrate the noises into the total sound of the instrument. The audience doesn't hear most of the noise, but they also lose much of the music itself. When hearing a triangle, do you hear just the chime, or do you also hear the metal being struck? Both are important to hear.

