I'm going to chime in with a few thoughts...
I don't think there was anything derogatory in the "If you are in such a big hurry, why are you walking?" remark, it sounds like something a local would say to folks asking how long to the next point a lot. I'd suspect those living along the AT might be asked that a lot. But I offer that when it's said, it's said in jest, not in contempt.
I've certainly regretted going too fast on trips, especially when I finished earlier than I figured, and I've commented here on getting depressed when having to go back to real life, though, as you said, it wasn't because I went too fast, it was because I lived in the city and had to go back to work when I returned
I've often wondered myself how through hikers can zoom by so much so fast. I understand the goal of a through hike, and I truly admire those who work at it, but I've just never had that urge, not even a smidgeon of one, and it's a very different attraction to getting out than mine, and a very different experience too considering how much of what we do and use is the same.
But there is a sort of tension between these styles. There has been for a very long time. I was a part of it myself, and you're right, there shouldn't be. There's no good reason for it.
I've never been able to put "thru-hikers" on any pedestal to gaze up on, and I have met a few that I thought expected that, and at one time I considered all those who "had to do 20 miles a day" a peculiar type of snob and I let it color my attitude towards them.
Over the years I also met a few that would have never mentioned it had the subject of hiking not come up somehow, and because we had so much common ground, and such different approaches to enjoying it, I was forced to lose my prejudice and appreciate our differences instead. I realized that I too had to be a peculiar type of snob by holding on to them. And I realized why I had been too.
Brian, I really enjoyed following your trip this year. Blogs like yours have enabled me to better understand what motivates you guys without feeling like your putting me down.
I still think you guys are kind of weird
but I realized that you're not at all motivated by making me feel wimpy, and that's truly the root cause of the tension when it exists, at least it was for me. It's easy to let oneself be intimidated without cause. It's silly too.
"If you are in such a big hurry, why are you walking?" is hillbilly humor. It's often followed up with "You can't get there from here." There's no harm intended, just poking fun.