>Europe is ~800million people with very different cultures. You can find geniuses here. You can find entrepreneurs. You can also find people that are sloppy. You can find people that have built billion dollar tech companies.

But you can't find a Silicon Valley or a similar economic and/or cultural spot. He's trying to explain why.

>Stop generalizing

Generalizing is the (literal and historical) start of science -- putting things in general categories and taxonomies is essential in understanding them.

There are categories of things -- and different places have different characteristics in aggregate, not just because "there are various kinds of people in general".