I think PP is referring to a very specific type of buyer profile.
In March 2019, the BoE cut interest rates to a record low. It was glaringly obvious that they'd go up. Maybe not to the extent they have, as before that it was still 1%. 0.1% to the previous 0.5 - 0.75
However, there were many people on those threads who clearly couldn't afford even a 0.5% increase based on the plans they were making. Not only were they on the cusp of affordability with the extremely low rate, they also had plans for more children, extensions, and a myriad of other things.
Of course if they could afford it all no need to post asking whether it was a good idea.
The sentiment from other posters was very much to plough ahead without thinking. It was a crazy time for housebuying in general. Things were going for crazy prices, crap that would've languished for months if sold now , flew off the shelves.
There's something called animal spirits in the investment world that relates to the phenomenon. People get caught up and make irrational decisions fearing they'll lose out.
I feel sorry for people who planned ahead and found themselves hit with an unexpected rate rise like this. But many didn't expect even a small one. And many took the risk - thinking the economy would recover, they'd get higher paid jobs etc to cover. Or SAHM return to work. It just never happend.
We were trying to buy at that time but stopped after 3 purchases fell through. We finally bought a year ago. I was distraught at first - we'd lost out on some dream houses. But in hindsight, it might not have been a bad thing. Our budget is stress tested to the hilt due to the experience. We might not be in the area with the best schools but if we can't move by the time the kids start, we'll be able to afford private tutoring etc.
The naice house in the naice MC area is close to 100K more than ours. And while our area is the 'nice' bit of a deprived area it's definitely not MC. There are people with expensive sport cars also work vans.