Matt Damon also commented about the drastic weight loss he underwent for the film Courage Under Fire, where he played a heroin addict that was hiding it from the military. And I think shortly after that he was in a role that required him to bulk up, so he had that drastic biological shift to the other extreme, which is never good. I know something similar happened with Christian Bale, pre-Batman. As I recall, his last film pre Batman Begins, was a movie where he plays a drug addict, and he lost a SCARY amount of weight for it, and then turns around and speed bulks. That's just not healthy, and they have no way to know what the next script will be, compared to the last.
So yeah, I'm totally fine with actors not being "accurate" to fictional depictions that aren't feasible for the majority of humanity for an extended length of time. Because unlike comic books, where Bruce can be steroid level jacked for decades, fighting in the equivalent to MMA royal rumbles, and not have any lasting problems, the real actors have to actually LIVE with the ramifications on their bodies.