What bubble/ivory tower part of the country are you in? $1m is enough. Especially with a paid-off mortgage. Most people get by for way, way less than that.
So, the ivory tower remark seems appropriate.
They making the probably-fair assumption that these hypothetical people want to live at least close to where they're rooted their lives.
Neither here nor there. The GP was responding to "$1M is not enough for most people to retire on."
i.e. "$1m is not enough for most people in the US to never work again assuming they want to live to the standard that I have become accustomed to."
Which very likely does not apply to "most people". We do pretty well for ourselves and it's easy to forget that "most people" live paycheck to paycheck on far less.