> Why would the admins of such sites resort to Cloudflare if 'fundamental Internet infrastructure becomes inhospitable for them' by making that choice? They could very well choose to implement their own or no measures at all.

Marketing and free tiers.

But my point is that Cloudflare is addressing threats that predominantly affect businesses, and does so well, but the way it does is effectively changing the whole Internet to be more hospitable for commerce, and less hospitable for any other kind of use.