Respect needs to be earned.
I have some friends who tell their kids to say “Mr. Feif Un”. I ask them just to call me by my first name. Some do, some say no, they want their kids to learn respect.
Tzedakah organizations will call me and ask “Is this Rabbi Feif Un?” I reply no, that would be my brother. I’m Mr. Feif Un. You need to know what you are. Giving people false titles doesn’t give respect, it takes it away.
When I was younger, in elementary school, all male teachers were called “Rabbi”. We clearly recognized that many of them were not Rabbis. That took away from the title of Rabbi, and leads to thinking less of those that do deserve the title.