As I understand it, very little of Replit and Lovable (especially) are actually B2C. A lot of it is internal teams at mid-sized companies, which are a huge and demonstrably very fruitful customer segment, and one that Cloudflare does in fact serve already.

Cloudflare has already started releasing products that point in this direction. Not sure how far they will (or should) go, but it's really not categorically ridiculous or impossible or nonsensical, as you're implying.

https://blog.cloudflare.com/cloudflare-os/