> It's such a fundamental part of being a human being I can't at all relate to seeing it as a mechanical process such as flossing

I mean, I agree with you and everything but you're saying "this thing is so important to me I cannot understand other people". There are a reasonably large number of people who would be very happy if they only ever ate a bowl of cereal and a banana for breakfast every single day for the rest of their life. I don't understand it, and I wouldn't like it, but I don't want to prevent them the comfort they get from that.