I gotta agree.
I tried Schwalbe Pro One's, and although I really liked the smoothness of the ride, I grew tired of cleaning sealant off my frame after most rides.
The tires got small holes on almost every ride, but sealed up right away. They just made a mess of my bike.
I hate to think of how difficult it would be if I had to put in a tube on the road.
I went back to tubes.
Next I'll try the Aerothan lightweight tubes.
No more road tubeless for me.