The point, in my interpretation, is: don't put all your eggs in the basket of your latter years. Find the balance of long term planning and short term fulfillment.
Nobody's suggesting doing such though (yet the comment seemed to imply someone had). The suggestion was to save a meager $10K/year, which is tiny relative to the salaries of most people on here.
It's 20% of the gross median household income. For the typical family it's probably closer to 25%-30% or more of their gross pay net of taxes. That's a lot of money to save for this kind of household. It's simply not a realistic goal for the majority of households in America.