Judging from the number of people jumping on to Unreal and Unity, I don't think it does go without saying. And if you use the marketplace assets, you're going to end up with a game that looks like everyone else's game that also uses assets out of the marketplace.

It makes certain aspects of connecting art assets with gameplay code easier, but I don't think it at all makes it "very easy". We're still talking about a non-trivial amount of programming here. If you're not a programmer already, gameplay code is still going to be a struggle.