Gregory's Server
The wording of your reply implied it's not "opt-out" and that the person asking about it was wrong. Yet it's easily verified it is enabled as soon as Firefox updates itself to version 128, with no user action required.
I just verified that myself on one of the computers where I'm not running ESR.
If you meant "opt-out is fine, it doesn't bother me", then I think far from dismissing it, you've confirmed that Mozilla's entrenching on this issue and it's serious.