If you grew up poor and find Vimes' boots theory to be anything but silly, I'd be curious to hear why (this question is the point of the thread).
As someone who read the Pratchett bit when I was a poor kid and appreciated it as a bit, I've been baffled by how often I see people take it seriously, both on the internet (it's frequently the top comment in poverty discussions) as well as IRL.
I've polled quite a few poor people about this and literally everyone has had the same reaction as me.