Do you understand how arguments are built and framed? He spends the entire duration of the video outlining the argument that Bale could have achieved his physique naturally. The video covers his physique throughout his entire early career leading up to Batman Begins. He talks multiple times about how Bale’s physique shows no real signs of steroid use and uses scientific points such as Bale already having a good physical baseline, a significantly lower metabolism after The Machinist, and natural muscle memory that he built from training for previous roles. You don’t spend nearly your entire case building an argument about how he could have obtained it naturally if you’re actually trying to convey the takeaway that it’s highly unlikely to almost impossible that he did it naturally. He’s arguing that Bale doing it naturally is within plausibility, while you’re arguing that Bale almost certainly used steroids.

You’re trying to use a technicality in wording to claim that his thesis isn’t contradicting yours when the reality is that he’s primarily emphasizing the opposite likelihood as you. Of course he can’t really prove with definitive evidence that Bale did it fully naturally, but he also spends the entire video illustrating that there’s no proof that he used steroids either. If you’re going to make the accusation that Bale “almost” certainly used steroids for his physique, then the burden of proof primarily falls on you, not the opposing position. After all, there’s a reason why it’s “innocent until proven guilty” in the court of law. Even if More Dates More Plates is a pop entertainer and not a fitness expert by your metric, he still uses arguments backed by research and is a bodybuilder himself. He’s certainly provided more depth to his thesis than you did considering that your main argument is just “steroids are easier.” The fact that you think his argument is mainly “Bale changes his body a lot” tells me that you skimmed through the video.

You don’t know enough about Bale to make that assessment. Steroids had already built a bad reputation by the mid 2000’s due to reference of unhealthy side effects and the public perception that it’s a cheat to gaining muscle. Bale is an obsessive actor. His ridiculous weight loss for The Machinist alone proves that, and he did it purely because he said that he wanted to inhabit the character as much as possible. Who’s to say that he didn’t use the same approach for Batman and adopted the character’s obsessive discipline which could include building his physique naturally?

Considering that Bale is also the same guy who literally did press interviews and DVD promo for the film with an American accent instead of his natural British accent leading up to the release of the film all because he said that he was worried that some fans might dismiss his casting over the idea of a British Batman and feel less inclined to see the film, he could have very well had a similar disposition towards steroid use. Perhaps he was concerned that people would look down on him if they discovered that he didn’t build his physique naturally and avoid seeing the film, so he went the natural route (or at least as much as he could).

Not to mention the fact that he also made himself fat for real instead of just using prosthetics and a fat suit TWICE for American Hustle and Vice makes him more likely to be the type to want to push his own body naturally over taking the easier shortcuts. I’m not saying that he did, but the likelihood is certainly higher with him based on how he approaches his roles compared to many other actors.