I got two problems with this list. First, for many items on the list, I can actually come up with examples of successful attempts that tackle the problem. Seconds, it feels like that even the ideas that failed so far look like that there is nothing inherently wrong with them, it's just that no ones figured out yet how to do them well.

It's actually a good list of problems that still need to be solved (and you could be the one who solves them), not a list of ideas you should avoid at all costs.