Without at least bollards the road isn't actually thinner, so people don't actually drive slower. And without at least bollards, I wouldn't let my kids ride in a bike lane— which means many other people won't feel safe either. It's unfortunate that politicians get away with this willful disregard.
Paint doesn't make people drive slower--it's at best encouragement, and a lot of people don't. And that's when the bike lane is even clear: often it just gets used as a temporary parking area for Ubers and delivery vehicles, making it fairly useless for bikes during busy times.