If Josh is going for the first down he ain’t pushing the limits before he slides, he’s running the guy over.
My thought is Trevour tries to get the very most out of the run, if you don’t want to get hit slide earlier. That simple. I agree protecting the QB but it’s also his job to protect himself as well. Defensive players have a hard job, getting out of the way once fully committing to hit isn’t always possible.