I was going to write most in my original post, but I figured most reasonable humans know that climbing stairs does not mean climbing all stairs in the world ever.
It seems like it's been a while since you read the HN guidelines. It might be good to read them again.
I'm not sure that it was at all obvious. You suggested that all ramp building and such accessibility activity should be replaced by a stair climbing chair. I, via a bit of snark, pointed out that such a suggestion is impractical.
You and I will have to disagree on whether or not my 1 line of snark (respectfully labeled as such) in an otherwise civil and respectful reply about the practicalities of ramps constitutes incivility. I personally would say that in a conversation face to face, and very few people find me offensive (and many of those who choose to be insulted by my views not my conversational style).
It seems like it's been a while since you read the HN guidelines. It might be good to read them again.