Counterpoint, my personal project sites aren't that important, but are self-hosted. My blog being inaccessible for for half a day is preferable, to having to figure out my own protections, and why not just use their free CDN while I'm at it.

Do i need to? Definitely not. Am i going to stop using cloudflare? Also no.

When it comes to bigger sites, i think having someone to blame for an outage (especially when these big ones are effectively "the whole Internet broke") is still probably preferable to managing it all yourself.