Opt-out telemetry is unacceptable, this also signals that the product team has no vision and the organization is riddled with bureaucracy. Great products get built by someone with a vision to create them, mediocre products gets created by product managers justifying their positions with data they've gleaned by spying on users.
100% agreement from me. People have trouble believing this, but software existed before telemetry existed. We didn’t have trouble understanding where user pain points were back then, because we actually performed user studies, and offered the ability for users to provide feedback if they wanted to. The field of UX wasn’t born the moment someone wrote the first telemetry library.
If anything, people seem to have much more difficulty understanding user pain points right now.