I thought "hard" was meant in a purely technical sense. But anyways - three smart guys in a garage can build a minimum viable photo sharing application using k

I thought "hard" was meant in a purely technical sense. But anyways - three smart guys in a garage can build a minimum viable photo sharing application using knowledge and technology obtained from the internet. You can say "oh, it's hard to do photo sharing right, it's a hard problem", but the fact is there are technological problems out there that are hard to do at all, that are completely beyond the reach of three smart guys in a garage using only knowledge available on the internet.