There's no way to do pro-wrestling COMPLETELY safe. Again, it's not ballet.
That said, I do think you can make an arguement that wrestling has sort of evolved into a more dangerous profession how that performers are taking bigger bumps. Lou Thesz wasn't performing 2-3 dives onto concrete 3-4 days a week back in the day. It was still dangerous and always will be, but for better or for worse the bar has been raised.