I blame Michael Jackson and Madonna. They got to be hugely successful by emphasizing all the wrong things.
I have “The Who at the Isle of Wight” from 1970 on DVD.....the stage was just the four of them....no pyrotechnics, no fancy light shows.....and it totally blows away anything else I’d ever seen....because the four of them were at the top of their game in their respective instruments, and their stage presence, they were the show, not the effects.