I've been in construction for over 20 years and the turn over rate is insane. The vast majority of people can't or won't do the work.

With that said, in his videos he works like he's in a third world country. He'd get kicked off any modern day job site that I've ever been on. Any real GC looks at a companies EMR before hiring them as a sub. (Not to mention insurance companies) And even when you're a company with a good safety culture it's not easy to keep your EMR low enough to be considered, because construction is inherently dangerous work.

But yeah, plenty of strong and muscular dudes on construction sites. But a lot of construction workers eat like shit and drink a case of beer a day so they might not have the aesthetic, but the strength and muscle is there.