Unfortunately there are lots of materials run through a table saw which can trigger a sawstop. A false positive destroys the blade. Decent blades cost several hundred dollars, and are intended to be resharpened and last for many years.

I belong to a community hobbyist workshop. There are a lot of rules, lockouts and a key in place around the table saw usage, but they won't install a sawstop because they can't afford to keep up with the wasted blades.

Personally, I think I'd rather have one, but I can absolutely see why people would disable them if they were mandatory.