Why yes many rock musicals opened when the theme of the show was relevant. For example, RENT opened during the AIDS epidemic..as we all know.
However, HAIR is HAIR. It's a classic show that I am sure many tourists and older people who will be going that saw the original production. Legally Blonde is a little different...it was a brand new show, so you never know how exactly it will do. But I just think HAIR is such a popular show it doesn't need to be relevant to sell well.
I'm a professional. Whenever something goes wrong on stage, I know how to handle it so no one ever remembers. I flash my %#$&.
"Jayne just sat there while Gina flailed around the stage like an idiot."