Maybe in a perfect world, but it’s not as simple as that, there’s a real chance that their friend could start bullying/offending someone because they are trans/non-binary or whatever, and they’d need to be stopped, telling them that they can do it just because they disagree with them, if they were transphobic and didn’t let it stop them from trying to be kind or just neutral to trans people even though they really want to tell them they’re wrong or something, I would agree with you, but that doesn’t seem to be the case, based on the fact that the person posting this knows they’re transphobic, and when they start doing something that risks pushing someone to the limit, that’s when it gets dangerous. In the worst case, someone’s life could be on the line, and friends should let other friends know that they’re doing something wrong, even if it jeopardizes their friendship. Disagreeing with someone else’s opinion is very different than their choice being wrong, there’s no opinion involved, causing someone mental struggling is wrong