Such is the nature of creation! Creating anything requires familiarity with the tools, and patience. I can understand the guy's frustration, but not working through the tutorials is like trying to work a complex widget without reading the instructions. 'Accessible' sadly doesn't involve reading people's minds, and the people will still need to think according to the ways the tools permit them. I hope the structure of the game (apparently you need to complete all 60 levels or tutes before you're allowed to create anything) ensures people aren't put off when it comes to trying to make their stuff.
I also wonder if the nature of the create in game still exists? There's a separate creation phase now, though still interactive. Can you, while playing, pull up Popit and buils stuff in levels? Early talk was of levels having user-creation areas where the player might be required to build a bridge or tank or solution to an obstacle. And 'sponge/fluff' was going to be a payment system for how much you could build. There's been no word on this since, and no showing whatsoever of creating stuff in levels. I do hope that's still in as it was unique gamepaly, the player having to build their own solutions.