OK, if there is a monopolistic instance between you and the rest of the world that decides who can reach you and who not and you are depending on that single monopolistic instance, I think we all agree that this is a bad thing.
Potential threads from this are (but not limited to):
- cloudflare going up in price and you have to take it.
- cloudflare is blocking or restricting access to your page, because of political dispute.
- cloudflare collects meta data to reconstruct user behavior and social relationship and uses it to pressure individuals.