Theres a LOT of emulators that got caught in all that not just the ones that were taken down for legal reasons. Theres a reason most of the new emulators are not on Github/public git sites anymore.

Im not saying your wrong, what I am saying is that the situation is a bit nuanced and if a PSX emulator wants to push their "rights" they might find they actually dont have any when push comes to shove.