Well, true or not, it remains a fact that none of us knows the height of the person in front or or behind us when we book our seats.
Exchanging seats with the short person behind you is a lovely idea, but it merely pushes the problem back a row.
Particularly given the price of orchestra seats, there's no way I'm going to agree to always sit in the rear orchestra, far from the stage. If I pay top dollar, I want to sit as close as possible, just as many short people do.
All communal events require that we put up with a degree of inconvenience from our fellow playgoers. We're spoiled by TV. I seriously doubt this thread would even have been a subject of discussion in the 1930s.