Endogenic and other non-traumagenic systems saying that they exist, and are real systems, is not "misinformation". There is no information proving that trauma is required for being a system. They are not claiming to "have DID without trauma"-- this point has been talked to death for over ten years now. Get over it.
Saying that even if they exist, they must be disordered because that's how the brain works, is anti-science. We do not know, at present, all the ways in which the brain works in regards to plurality. It has not been proven, anywhere, at any time, that systems MUST be disordered.
Non-traumagenic systems (as a whole) are not "stealing" terms. Any terms they've been using were either created by their part of the community, have been shared-use for decades, or were freely given to the plural community as a whole.
Non-traumagenic systems, like traumagenic systems, are often neurodivergent in other ways, disabled, queer, etc. They belong in ND, disabled, and queer spaces.
Using scary "invasion" rhetoric is fascist shit. Claiming "endogenics are invading ALL spaces, they want to invade all spaces and it's going harm us REAL systems!!!" is fascist shit. Instilling fear of some "other" (in reality, an innocent party that is just existing in peace) that is coming into YOUR territory (in reality, a communal space) to take over YOUR things (in reality, communal things) and destroy your community (with no proper explanation or proof as to how, exactly) is fascist shit.
I just remembered I can post whatever I want so Here r some doodles of demoman kissing the mercs inspired by the "I am gonna kiss ya!" voiceline. for no reason. Bonus because self love is essential
EDIT: I FORGOT TO ADD SCOUTS DOOODLE WOOPS