Why Isn't Everything Private?

I think things can be coincidently public or private as well, where you just kind of either do it by fault, or you'd you make something private because you don't have a use for it yet. Just cause you don't use it today doesn't mean that it shouldn't ever be used. So if i see another developers code and thy've got a private method, that, to me, isn't a promise or a warning that i shouldn't ever use that method. It's saying, no one else is using it right now. I've prevented the leakage. That's an interest e take. Yo, i use those as gates. I think they'll serve as better gates