If you’re not willing to trust what they say about the anonymity of the telemetry system, or to opt out, then I think you wouldn’t be happy trusting them with all your passwords in the first place!
If you’re willing to stick to Safari, then I think using Apple Keychain is best, especially since they’ll be adding sharing this year.
Nice that they’re working to make the game better. I was excited for it but it got bad press so I held off. Hope that it gets to the point where it’s worth picking up to play with friends.