What about people who actually have psychosis/MD saying that shifting is what they have?

Basically the title lol. So what do you guys do when people who actually have psychosis or maladaptive daydreaming say shifting isn’t real? It’s not like most antis because they actually have it. You can find what they’re saying abt shifting on their respective subreddits. I searched it up and now I feel demotivated again 😭