It's interesting Dean says this because you also hear people complaining that WWE is full of too many marks who care too much about the craft and whatnot.
Truthfully, it's hard to tell which mindset is better to have. Wrestling is a fukking hard job, especially on the WWE schedule. I have no idea why anyone who didn't love it at least a little bit would do it. I mean, unless you're Brock Lesnar and someone is paying you millions. Even then, Lesnar isn't putting in near the amount of work or time on the road the guys Ambrose is talking about are. Not to mention improving one's skills, and thus, hopefully your chances of making more money. You don't get an AJ Styles level talent from someone who doesn't care at all. Not normally, anyway.
On the flip side, given just how much WWE fukks over their talent, maybe looking at it as just a gig is better for your mental state in the long run. You look at someone like Ambrose or Sasha, where we've literally seen the fire go out of their eyes when the harsh realities of working in WWE hit them. Probably not gonna happen to some of the football and gymnastics wash outs who just showed up at the PC when Trips came a calling and they didn't have any better prospects. It's just work for them, so they're not going to care as much.