If you know the word hurts others and then you double down and insist on using it, then yeah, you’re on the attack because clearly you don’t care that you are hurting people.

That would be a pretty ok argument, if you wasn't extending it to all of the internet. But you are, so it becomes "somebody somewhere on the world has a problem with your words, you should adjust or you are a bad person". And no, that form isn't reasonable.

It's also not reasonable if that person that has a problem with "duck" then comes back and say "yeah, and I have a problem with 'early' too", and you change early to something else, and they come back and say "yeah, we have a problem with 'of', can you stop that too?". And it just happens to be the same people raising a lot of other demands on a lot of other contexts, to the point that some people are just leaving the group to avoid them.