I read some tweet that it's paternalistic (read: coercive). Dude, I don't think you know what coercion means if you think this voluntary software offering and option to default to helping protect you is coercive.
I'll turn it on, but one shouldn't rely on unconfirmed transactions anyway. It's like not wearing a seatbelt when driving a car. Full-RBF, is the seatbelt. I can see times where this is necessary if you're 007 or something and need to lean out the fire a gun (not show how this metaphor translates to Bitcoin anymore, lol), but wearing a seatbelt will save you in real life, if not from yourself, definitely from other drivers.