The issue here is there is not clear line for where one should start and stop moderating their own service. eg do they disallow anything illegal? What about stu

The issue here is there is not clear line for where one should start and stop moderating their own service. eg do they disallow anything illegal? What about stuff that is illegal in some countries but not others? What about stuff that is immoral but not illegal? Then who defines what is immoral and what is unpopular? Or do you then just ban anything that is also unpopular as well? There is a reason why platforms like Cloudflare, Google and ISPs are against proactively moderating their own services; from a business standpoint it's an expensive and futile task (because it's dead easy for malicious actors to set up new sites and re-abuse the aforementioned services) and from a social perspective it's not Cloudflares job as a CDN to dictate what is and isn't socially acceptable. Now just because Cloudflare have taken the decision not to police the internet that doesn't mean they cannot be trusted with your privacy. Those two points you're trying to equate are actually unrelated.