“If you don’t want to support tipping culture, don’t go somewhere that expects tips. But if you do happen to go somewhere that expects tips (regardless of how you end up going there) you absolutely must support tipping culture”.

Now let me take your point into absurdity.

“If you don’t want to support gun violence you shouldn’t own a gun. But if you happen to own a gun you should do a mass shooting.” That’s how your argument comes across to me. I have no issue with the first part of your argument, I do that. But I have an issue with the second part because that is defending tipping culture.