I'd even go simpler than that. "If calling people by their preferred pronouns is one of the hundred biggest challenges...." Inserting "correct" into the statement just begs to get into an argument with a conservative and feels like you're trying to force them to accept a different reality than they want to.
IMHO it's simply a personal preference thing. Let people live how they want to live. You don't have to convince everyone that Sally is really a woman trapped in the body of a man, you just have to say that it's her preference you call her as a "she". People should have the freedom to define themselves. That's it. End of story.
My conservative neighbor brought up trans stuff thinking he'd use all the conservative media talking points and my answer was simply "it doesn't really bother me. I'm a live and let live kind of guy. If they want me to use a different pronoun I'll do my best to switch to that pronoun." If you spin it as a freedom instead of a reality then it's easier to accept.