Because giving grief to the workers doesn’t trickle up to the owners. They make the same money regardless.
You can give shit to the owners while making sure workers make a living wage. These things are not related.
If you don’t want to tip, then don’t tip. But still give grief to the owners. If everyone shit on the owners as much as the staff things would change.
“Tipping culture” is a very reductive way to describe a living wage, but sure. Go you.