That's the point isn't it? If all you ever get is small punctures you might be alright. When I've had punctures, I can't recall choosing how big they were, there is a point where no slime will help at all. Talk up the benefits all you like, the downsides are equally worth considering..
Totally agree with not getting a choice, however experience real life tells me it has stopped a lot of road side repairs.
Also not forgetting I use tubeless on my MTB and you will not get them to seal with a sealant, have you tried?