There's some degree of neural inertia so to speak, when minds have carved themselves into a shape they tend to resist most change, same as the banks of a river. I've seen both someone actually change and someone go back. For what it's worth I'm not stressed by my attempts to change them, I find it fun and entertaining. I have said though you need to feel it out. If someone is anchored in there's no point really. It's just the ones where there is movement where I'm intrigued. There's a reason they say children are the future, they're not mentally anchored to much so one can redefine what is normal, right, or wrong very easily.

We're not here to be super man or wonder woman, not to save the world. Just make it a little better than it was before we leave this place so that others may know less needless and avoidable suffering. As they say, it's a wise person who plants trees whose shade they will never know.