> I only had to read the first few sentences of the first point to see that the author thinks problems are easy because they don't understand the difficulties.

> I only had to read the first few sentences of the first point to see that the author thinks problems are easy because they don't understand the difficulties. It's because you haven't read it till the end. He explains these things haven't been solved exactly because they are difficult and (he believes) unmonetizeable.