We associate psychosis with danger because it does in fact become dangerous.
I wish I could go back six years when my ex was was at the beginning of his mental health vulnerability, when he could be reasoned with and get the early help intervention. But as I'm sure you know mental health support for adults is unnecessarily hard to access. They have to be at a certain point before they step in.
Now he has deteriorated to a point that anyone who he deems a threat; isn't safe with him, plain and simple.
My daughters cannot be around their dad as he had a crisis episodes with them, during a supervised contact and he doesn't seem to "care" who he is around.
I could list all the behaviours that he displays that will certainly make anyone feel frightened and worried for themselves, others and him.
As someone who also has a sister with cannabis induced psychosis, accessing help for her was unnecessarily hard. (It might just be our area of London) She manages ok now, with the help of medication. She wasn't sectioned, but she does have regular support.
We only managed that because she got to a point of walking down the street threatening to attack someone with a hammer. Yet even at that point, they still didn't think she was that bad, as she hadn't acted on her threats! However sadly in her case getting her the help she needed, meant she sees us as demons and has distanced herself from us, and it means that we have 'lost' a family member.
But knowing that she is alive and managing her mental health is a risk that was necessary, and triumphed over us knowing that she wouldn't want to be part of our family unit anymore.
I feel for the OP and others on here who have dealt with psychosis, it's not easy to deal with, it's frightening, frustrating and exhausting.
But as I've said in my previous post, the emotions have to come out of this and think logically. Trust your gut instincts, safeguard yourself and your child/ren first. The same how the mental health crisis team would advise.