>to “hide” the memory of the pain like a circumcision.
That's a pretty positive spin you put on lobotomizing a person, and stripping them of their human experience. What you're describing genuinely sounds exactly like what is in "Brave New World." If you give people the option of forgetting everything bad whenever they feel like it, like dosing soma, they will literally constantly be doing that, and there's no way that could be a good thing.
I understand the want to eliminate mental illnesses like PTSD and others, but for me personally, this is way overboard.
As for the RFID thing, you're comparing apples to open-brain surgery. A sub-dermal implant, or even more critical devices like pacemakers, are leagues away from a computer in your actual brain.