I’m specifically talking about going from zero to infodump in response to a casual “How’s it going?”. Infodumping is awesome, but only when it’s consensual.
ND people can be selfish just like NTs can. Using words with clear meanings is good, and discomfort is not harm, and the fact that the way A describes B’s behavior makes B uncomfortable doesn’t mean A is wrong. Eschew euphemisms.
But please, if you have a better descriptor than “selfish” to describe “suddenly talking past and over someone to satisfy your own internal urge to be fully understood without first confirming that your audience actually wants to spend their own precious time and attention and effort on understanding you”, I’m all ears. “I didn’t mean to be selfish” or “I was just giving an honest answer” are both explanations but not excuses for being selfish.
To be clear: I have been on both sides of awkward greetings, with all types of people. This is not an NT-vs-ND issue — NDs can be quite annoying to other NDs when their infodump interests collide, and NTs can be annoying in the same and different ways. “How to perform the greeting ritual protocol fluidly” advice is universal.