The fact that they could perform DPI doesn't change the reality that most ISPs probably aren't doing it, unless mandated by law, because it's expensive and in my main country of residence they can't sell that data to offset the cost.
I'm surprised to see such lack of nuance coming from you.
* for the countries/ISPs that don't also hijack all DNS
https://en.wikipedia.org/wiki/DNS_hijacking#Manipulation_by_...
Encrypted DNS isn't an "any day now", basically every platform and browser and provider supports it, and 100% of my household's DNS requests are opaque to anyone watching the wire. And basically every system like Cloudflare supports ECH, so SNI isn't a thing for the vast majority of sites.