It's definitely more than 3 hours of work in between prep and other things they need to do when they're "not working" to keep them in the shape they need to be in for work. I don't think anyone can say what they do is not hard work.
But . . . I don't think they're going to find a lot of sympathy. Look around the country and how many people are working far more hours for far less pay often in grueling conditions. Theater is hard - but some of the posts I'm seeing talking about things being "inhumane" goes way too far. For the most part - we're not talking about a whole lot of profit margin and and changes like the ones being proposed would likely have trickle down effects that would be pretty harmful to many as well. These are very good well paying jobs. Yes - they are hard - but far from being different than what many others do in all sorts of industries. Issues such as work week, leave, vacation, etc. are pretty much seen everywhere now .