The same physics that cause a tubed tire to compress enough to pinch a tube against the rim, compress a tubeless tire against the rim sufficient to cause rim damage and/ or the bead to separate enough to flat the tire.

The point is that there is no free lunch. If there’s not enough pressure in the tire on a tubeless setup, by definition you can’t pinch flat, but bad things still happen.

So whether, you’re tuned or tubeless, there still needs to be enough air pressure to support the load and forces imposed. The precise math may change as to what is too low, but bad things still happen if the pressure is too low.