For example, I used one email for most of my life. But recently, I stopped using that email address, and have used another one due to wanting to boycott that company. Since I no longer use that email address, I should have to give the password to another person. This is just the right thing to do in all cases.

That would FREE UP a lot of email addresses. If you have any email addresses that you do not need, you are obligated to give your password to another person. If you don't, then they can't use email.

Just make sure that if you use that email to sign in to other websites using that email and password combination, go to all of those websites and notify your friends that you are giving your email to someone else and you are not the same person if you see future comments using that name.