GhostRider62, I have experienced that story many times. Had a lady come in the shop this summer. She bought a Trek with tubeless tires at a shop down the road about 2 years prior, but never rode it. Couldn't understand why the tires were flat. After all they were tubeless. After much explanation I convinced her to allow us to put tubes in it so that it would be like a normal bike. Quite happy she was.
The absolute majority of bike shop customers are not bike forum members. They are one and done buyers. The Trek guys sold her the latest and greatest tech and she would not have to worry about flat tires anymore because it was tubeless! hahahaha! They did not explain to her that tubeless still needs to be maintained with air and sealant, and if they had she would not have been able to handle it anyway. Reminder to the sales people: KISS.