If there is some uncertainty in the answer, maybe you have a point. But people can just be wrong.
Professional cooking is not any less art (as opposed to a quality process) than amateur. I'd instead listen to the chemical process engineers in food space, who - guess what - may just say the cakes shouldn't cost anywhere near to $50 :).
It is more like the guy who can paint very good landscapes would start criticising every oscar category from producing to sound design, telling that they have 0 idea what they are doing, and he would do it better. "Why the credits of Transformers are 5 minutes long with hundreds of people, you don't need more than 50 people to make such movie"... This is how Blow often sounds to me.
It appears to be taking Jon longer to make each game three years to make Braid, seven years to make The Witness, more than a decade to make OOTSS, though doubtless he will say that Jai (or whatever he decides that language should be called) held up OOTSS and somehow it would simultaneously have taken longer in C++ and yet it took so long because he didn't want to use C++.