It's not courtesy if it's non consensual, same way that wealth redistribution isn't charity. Statistically and rhetorically speaking, the pronouns enforcers' beneficiaries are the sensitive snowflakes who can't do with a few people not indulging in their delusions.
You completely misunderstand the point. The vastly different level of threat itself is of no importance to the comparison, since the goal isn't to enact said threat, it's to force people to publicly betray their convictions, to mentally castrate them. It's nothing more than Orwell's "2 + 2 = 5", if you prefer this analogy.
Maybe it's a special snowflake thing to want to live with your head held high, standing for what you think is true, what do I know...
> I wonder how you feel about the nearly 1.7% of people born intersex that you meet and definitely work with
There's nothing to feel, these people are neither male or female and would indeed deserve a specific pronoun, but pragmatism would make it as logical as making all cars fit for one-armed people. Also, your 1.7% is a bit biased, reading its source from Wikipedia's article.