If people can make small changes independently to get to a better state, what accounts for them not doing so? I can't believe it if I can't imagine it, and if

If people can make small changes independently to get to a better state, what accounts for them not doing so? I can't believe it if I can't imagine it, and if you think it's possible, you should share how. I think this is a dispute over semantics. It's not very productive to argue whether something is true or false when people define terms differently. Better to explain how you define them.