And tubulars can roll right off the rim, even when glued correctly.
All tire systems have their strengths and weaknesses, and all have their place. All things considered, When you factor in the likelihood of flats, the pressure you can run, the availability of tires, cost, ease of maintenance... For the average rider, tubeless is the way to go. You can run lower pressure, have excellent flat protection, most tires these days are compatible with tubeless so you have a wide selection for the terrain you run, and yes, while you can burp a tire, it's not likely if you keep the fluid topped off and run pressures that are not so low that you're bottoming out the rims.