...sounds like a roundabout way in which free will is ultimately violated. It would require consent. The nuance, however, may be interesting to think about.
In order for a person to sincerely feel happy, you would have to alter a lot more than just a person's mind. Because sincere happiness can be said to be interrelated to everything else that's going on in the universe, you can't just separate out and make a simple modification to a person's mind (or even environment) in order to create happiness.
It may, however, be possible with consent, to do something...\
But let's consider other more nuanced ideas...
Memories might be changed, yes... but memories are probably not the only way in which people relate to reality. You may be able to change a person's memories and make them happier, but would it be sincere happiness?
Or, let's say that you can actually isolate and root out a trauma that has been bothering someone... would the result be sincere happiness? Was anything necessary for happiness lost?
Maybe it depends.
Mind, environment, memories, trauma... I think changing any one of these may help make someone more sincerely happy, but it depends on the person's motivations, their consent, and other specifics of the situation...Post too long. Click here to view the full text.