Why you should NOT use people's "preferred pronouns"

The answer is quite simple: Because you control your own speech, nobody else. You should not allow other people, especially complete strangers, to control your speech, to dictate what words can and cannot come out of your mouth.

The main reason why the modern far left is so keen on "preferred pronouns" and forcing people to use them is because it's a form of control: It gives people power to control other people's behavior, and to force people to conform, and punish those who refuse to conform, instilling a culture of fear and submission. At its core, it's a way to restrict your freedoms, to control you.

You decide what words come out of your mouth, not somebody else. Do not let anybody bully you into allowing your speech to be controlled.

If someone is clearly a man, just refer to him as "he". If someone is clearly a woman, refer to her as "she". If you are unsure, especially if it's clear that that person has deliberately modified his or her appearance to make it unclear, use whichever pronoun you want and feel like. In fact, if you are unsure and if that person has "preferred pronouns" somewhere, if it's "he" or "she", deliberately use the opposite one. (If it's anything else, use whichever you want.)

Refusing to use people's "preferred pronouns" when they are clearly in contradiction to their sex is a form of non-conformism and protest. "You don't control my speech. I control my speech."