But it does make someone a hypocrite and maybe not someone you want to spend time listening to. In your example, it would be more relevant if you were a public figure who talked about the dangers of car driving wrt kids...
Hypocrites aren’t wrong; they’re just hypocrites. We need to detach our ego from this debate if we ever want to find a solution, and just so that of others.
That really doesn't leave many people worth listening to.