Comment by josephcsible

> Not just that. ISP knows the IP addresses anyway, so they can make an educated guess which domain you are accessing (or use SNI). So why would I want to leak this data to another entity?

Because a lot of sites are behind a CDN that makes such guessing infeasible, and can use ECH to block the SNI leak. And since your ISP knows your real identity and other personal info like physical address, it's better privacy-wise for them not to be the ones who know exactly which sites your IP is visiting.