I bet that WAS the initial main reason for the lower bowl standing all the time. People directly behind the benches couldn't see, so they stood up, so people behind them had to stand, and then it was just monkey see monkey do for the rest of the lower bowl.
I can't say anything that hasn't already been said, but I agree most with the poster who said STANDING DOES NOT MAKE YOU LOUDER. It does not make you a better fan, either. So why do you stand, other than to see over someone else who is standing for no reason? My father is 74 years old and my son isn't yet tall enough to see over you. We stand during defensive third downs and great plays. We get it. Stand out of pure joy and excitement. Don't just stand to be an asshat.
Anyway, I remember having to deal with the same arguments from people who smoked at the game, after they banned smoking in the stands. "I bought a ticket, I can do what I want. If you don't like it then stay home." So, for the most part these days, I do.
We had season tickets in row 1 of the upper deck during the mid-90s. It was beautiful. One of our party even made a set of cupholders in his woodshop that we brought to games and hooked over the front railing to hold our beers. Our neighbors loved it so the guy made some for them too. Then they rejiggered everything during the renovation and we got moved back, among a bunch of Canadians who thought it was great sport to smuggle in as many beers as possible, smoke, and root only for FLOOTIEBALL, EH. That was the last year we had tickets.