It's not. they're using phased array on the ground, which is far more expensive than the already-too-expensive-for-poor-countries parabolic dishes.

Does each household really need 600 Mbps link? I think that could serve as a whole city connection in many places.

Certainly not. But now you get in a much different business where you don't sell to consumers, but now you have to own/operate all your hot spots.

I don't think so. I run a freenet across my town and it's really not a problem at all.

SpaceX would have to run tens of thousands of what you're doing all over the world, where regulations and laws are different. It's not comparable at all.

Why would SpaceX run it? I am talking about freenets, the communities run these by themselves. SpaceX sells a station and connectivity to the group as a whole, and I'm pretty sure 600 Mbps (which conpares to nearly a hundred people watching a fullhd video, btw) is more than enough for a town - my network is still just 300 Mbps.

I think you're missing the point of spacex's business plan. First, what you're saying is somewhat common in the USA, but they have far too much competition in the USA for that to be profitable. Outside of the USA, WISPs aren't very common, and even if they were, it's a huge effort to sell your service through every other tiny company in different countries.