i think as a juicer you have a very warped sense of what a realistic physique is.
if you look around the gym at the regulars you see EVRY DAY working out hard and smart, 90% of them arnt nearly as jacked as you probably. its because they are natural. then there are the genetic freaks, and the juicers.
now think about what he looks like in thor. could some people attain that look naturally with extreme hard work and dedication? sure. he looks like a natural bodybuilder. do you think an ACTOR, would have the TIME (years of proper training and diet) and patience to live the life of the elite natural bodybuilders? i just dont see it. i'm sure he had an amazing work ethic, a great trainer, and a dietitian, and also some supplementation. like i said, if actors can do drugs to party, they will certainly do them to achieve the necessary look for the part they are playing.
and yes, it is easy to look jacked when you are lean, but its not very easy to be jacked and lean at the same time as you said. just look at the pic i posted up, at his neck, and arms. dead giveaway dude. veiny and huge