I am talking propriety and safety. Talking in a public situation about mental health issues puts you at risk with predators and gives employers fodder for sanctions. Accepting yourself for who you are is great. But mainstream folks generally don’t have those issues, don’t understand them and don’t care. My experience.
Some predator is going to have some serious trouble with me. Can I be hurt? Yes. Would I be any more of a target than another woman? No. Someone tries to play brain games with me? I can play them back with the best.
Everything about me that makes me vulnerable is the same as any other woman's vulnerabilities. When I am in the grips of depression I am more vulnerable in some ways, but I am also more protected during those times, because I know I can't take as good care of myself so I stay where it's safe. Grips of mania, my biggest risk would actually be jail time for using excessive force against a perceived threat.
Employers? I've actually found the opposite. My experience, very rarely does an employer react badly. Usually knowing that my eccentricity isn't an act, I really do think differently and I can't help it, and that there's an actual medical reason why I need criticism delivered gently, I'm given the attitude of (as a previous boss put it) "Oh, that's just Tessa, that's how she is". Yeah, I've had the occasional bad workplace, but I can vote on their outlook with my feet, and usually it's obvious quickly enough that my job hunting leads are still hot.
And mainstream folks often do have those issues. 1 in 5 Americans suffer from mental illness each year. 1 in 25 Americans are so debilitated each year that it causes significant life impairment. Those numbers mean that 1 in 5 people around you, everywhere you go, are mentally ill. Of the remaining 4, most of them have someone very close to them who is mentally ill. I have often found that when I say something about being mentally ill to a stranger, either said stranger tells me about their struggles, or said stranger tells me about their brother/husband/daughter/best friend.
You don't want to talk, then that is right for you. But to say that it makes someone vulnerable to predators, that's really only in certain circumstances, and telling a coworker or explaining to someone why you talk to yourself isn't it. The people who are vulnerable are at the mercy of a close relative/partner/friend who is abusive, who would be abusive whether the person is sick or well, and wants to keep them sick so they won't leave.