Telemetry is not digital rights management, nothing happens if you don’t have internet access or if you block the game with a firewall, you can still play the game fine. It’s a bummer you can’t opt-out of it completely obviously, but “they can collect whatever they want about you” is entirely false as long as you select “Limited Data” when it asks for your consent - they are GDPR compliant after all.
Here, I created a full image for you. Limited data is system & hardware specs, game crash logs & load times, network/server logs and online game data (e.g on an MMO/online match, H:ZD is offline game so doesn’t really apply) and “Legal information required by law”. Again, I don’t know when any of these are sent - it might be always you boot the game, it might be only when you send a crash log.
The first Fallout barely had anything, but Fallout 2 sure is something else having specific perks, traits and statistics about sex, a bunch of people you can have sex with and some you can get pregnant, and you can work as a prostitute or a porn actor. Or force some of your companions to do so.