The defence that it was a rehearsal isn't a defence. You still need clear boundaries, and to make both actors comfortable. There still should have been an intimacy coordinator.
This isn't nice for male actors either, they could have been abused themselves. They could have heard it happening to a parent or sibling growing up. If the lawsuit is correct it's just awful all round.
Doesn't surprise me. I graduated 20 years ago with a 2:1 from a Russel group and it was utterly worthless then. If I could go back in time I'd never, ever go to uni again and I'd never recommend anyone do.