and a private telecommunications company can read absolutely all your digital communication
Well maybe. It’s one of the reasons e2e encryption is so imperative to online privacy. For instance, turning on https everywhere, then your isp can only see which servers you’re connecting to, not what’s in your traffic to them.
And to point it out up front, yeah the distant end’s servers likely have some for of that traffic captured, but now law enforcement has to dig up every company that they’re trying to pull info from. Which is significantly more difficult than just relying on a one stop shop arrangement.
And for the best privacy, like security, a multi-layered approach is better. So throw in a VPN, throw in something like a mullvad browser, throw in pseudonymous accounts, throw in different usernames + passwords across accounts, throw in…