That presupposes that he realizes the idea was already executed. In any case, even if he did, I can think of a number of very good reasons why building somethi

That presupposes that he realizes the idea was already executed. In any case, even if he did, I can think of a number of very good reasons why building something similar to another already executed idea is still a worthwhile endeavor. For example, maybe he wanted a new portfolio piece or maybe he wanted to learn some new technologies. I like both. Yours is nicer though.