I mean, they're free to do whatever they, I just don't enjoy it; the frequency in which tips are being asked for now is just annoying, I didn't really think that's even a controversial statement.
But I do kind of dispute that it's just a "self esteem" thing. Often the "no tip" option is smaller and harder to spot, and I think that some people genuinely do not realize that "not tipping" is an option, and it's not like these kiosk manufacturers don't know this.