I would say certain people do this occupationally. (undercover agents, spies, actors, salespersons, politicians)
It’s very important to have the full layout situation for this like
Someone’s an alcoholic – can they change?
Someone thinks they are shallow and dumb, can they change?
It is my occupation to change others for health reason. By simple dose change, or more commonly to look at the layout, and seek the motivation that is there for change. Slow chronic encouragement and gentle pressure
You cant sell a car to someone who doesn’t drive (or at least you shouldn’t)
People really do change. It’s not common, and I don’t call the shots, I just try to be there to take credit for it when it happens.
If you are in a bad relationship – it’s generally a bad idea to wait for change.
If you are married with kids you own them every last ounce of effort you have before giving up. Sometimes, it’s a good idea to not go hunting Indians if your last name is Custer.