If this were true, there wouldn't be so much emphases on tipping. Right now, I feel like this guy is useless and I don't want to give him money and I feel bad

If this were true, there wouldn't be so much emphases on tipping. Right now, I feel like this guy is useless and I don't want to give him money and I feel bad about that, like by not paying him I'm calling him useless. If it were for the owner, and that was clear, I'd feel great because I was making his job easier by not causing any trouble or mess, and on top of that, hey thanks for the towel!