I don’t think that diapers do anything for someone who isn’t into them. With that in mind, wearing diapers probably wouldn’t make them happier or increase their quality of life.
I asked my first partner whether she wanted to share a special intimate time with me, in exchange for doing the same for her. She agreed to that, and we overall had a great time ageplaying. Though, it was one-sided. Later, I asked a close friend whether she wanted to ageplay with me. It was really fun for me to see her like that, but she didn’t like it and asked that I don’t request it again. I recently brought ageplay up with a close (male) friend, and he thought it was strange. He was interested in seeing me in all those pretty dresses, but he also commented that seeing diapers on me did nothing for him.
This Ask brings up a deeper question, though. What compels me (and maybe you?) to want to wear diapers and do other baby stuff. The way that I look at it, ageplay is something that we can acquire during (childhood) development. I think that it is not possible to (fully) acquire it in adulthood. Through association, a partner can maybe begin to enjoy diapers when they’re always used in a safe and romantic way. Though, I don’t have any experience with this. There is at least one person who has been DM’ing me, who is not into diapers, but interested in other aspects of what I post.
I don’t think that I can fully answer your question ^^;;. For sure I can make anyone into ABDL happy by making them wear a diaper, especially if I put them into one! Do you think that I could be a caretaker?