No one's against a feature being opt-out unless they actively dislike that feature. You're not going to make a post about the context menu items you don't use unless you have some political opposition against them.

Nobody complains about the ¤ key on their phone's English QWERTY keyboard, or the "generate QR code from tab" feature in Firefox that I'm sure you've never used. Neither of these features is opt-in, and yet you're content with them. It's because you don't have any political opinions about the features themselves. You don't actually care about opt-out when the feature doesn't bother you.