Earlier quoted context omitted.
It's a good thing you talked your friend down from creating something. The world has too many creators as it is. Don't they know that everything good has been created already? If it hasn't been done then it isn't possible!
Did you have a point here? Do you think he should have just said "sure man, sounds great, go for it!" Did you know that a lot of non-programmers have a lot of great ideas, and that educating them about the difficulties of implementing those ideas isn't actually a bad thing? The particular app in question has been tried a million times and countless hours have been invested into it, perhaps learning from that body of…
His friend would have made a lot of personal progress in their understanding and abilities.