What are some examples of "true things that happen to be taboo to say" that you can't say?
“Women getting paid less in the workplace is because they purposely pick lower paying jobs, not because they’re discriminated against”
“The BLM protests from last year were more riots than protests and were not justified considering the events that sparked them”
“Transsexual people are experiencing a mental disorder and this shouldn’t be encouraged or accepted”
How are you not taking a position on these if the question is in regards to "true things that happen to be taboo to say"?
The second semi-factual ("not justified" is a maybe subjective distinction);
The last is purely subjective, both in the "shouldn't" and the somewhat vague definition of "mental disorder".
That said, the furore around TS seems to be as much about enforcing terminology that appears to muddy-the-waters wrt biology i.e. what "woman" means, or should mean.
As a counterpoint, by invoking the "bear trap" argument you are dismissing the only possible way to prove your point. Both sides sound like logical fallacies to me.