It's the difference between having a belief and the way one enacts that belief.
The male prisoner can enact his belief and resort to threatening violence and virulent racist insults against Jennifer Melle who does not hold the same belief as him and she cannot enact her belief, fuinny that this belief enaction only goes one way.
I would suggest that a nurse can privately think what they like. I accept and endorse that there are times when to know natal sex or trans status is vital in medical situations. I don't think it's professional to use for ANY trans patient the title they have clearly rejected for themself, or the pronouns they have rejected. It's easy enough to avoid saying "Mr Jones". In fact I can't think of an occasion when my title has been used by a doctor or nurse in a hospital, I am always plain Emma Smith in bay 3. They probably haven't asked if it's Miss Smith, Ms Smith, Mrs Smith or Dr Smith for that matter.
The trans patients have rejected titles and pronouns for themself, which according to you means everyone else has to go along with their demands and collude in their belief about themselves, seriously? Trans patients can believe what the hell they like about themselves no-one should be forced to collude with and go along with that belief.
My baseline presumption, is that you cannot control someone's thoughts; they are entirely free to think that it's a load of bollocks, but there's no need to agitate patients in general by using "factual-but-rejected" titles and pronouns. You can thinks it's bollocks, but enacting that is unprofessional. I believe that was actually mentioned in the WORIADS judgement, that deliberate misgendering was unlikely to be treated with impunity.
No you cannot control people's thoughts but that is exacty what you are demanding is done by colluding with the falsity that the male person in front of Jennifer Melle must be referred to as a female person in line with his thoughts about himself. People must be forced to lie and go against their own deeply held beliefs, submit and be craven otherwise when they are subjected to virulent abuse and threats it's their own fault.
It's particularly inflammatory to decide to use a "factual-but-rejected" title with a person who is clearly a) violent and under restraint and b) already agitated and upset.
Look what you made me do, the mantra of the abuser the world over.