The idea that tights wouldn't work in a movie is entirely based on the premise that the movie is in a contemporary setting. Personally, I'd love to see a Batman movie that is almost a 1-for-1 live action adaptation of BTAS. In that setting, art/dark deco, you could have modern technologies with a classic 30s look and culture in which you could easily reconcile the costume design. I wouldn't make it tights though, but a tougher material with a kevlar body armor underneath. You could literally have a Bat-suit that looked exactly like BTAS/comics, have it make sense within the world it exists in, and sell it to the audience.
Audiences don't go into movies, especially superhero movies, expecting it to correlate with how things are in this world. You have to set up a world where everything the superhero does makes sense. Nolanverse Batman does not make sense for a 100% comic accurate Batman. That's fine by me, but just because neither he nor Tim Burton(who constructed a Bat-verse all of his own) found it suitable to do a black/grey outfit for the worlds they created doesn't mean it can't be done convincingly and better than any of the previous comic accurate portrayals of the Bat-suit in cinema(Adam West is the most atrocious example for sure, but there are also those serials from the 40s).