> > a tiny fraction of people are flying twice a week and also driving 400 miles a week, indicating that this is not a realistic estimate for the bulk of people it is being applied to.
>
> I do drive 400 miles a week easily as an Uber Driver

Do you also take an average of 7 flights a month?

If so, congratulations, you're part of the tiny minority of people that estimate describes.

If not, perhaps that helps illustrate why this is not a reasonable estimate for the vast majority of people it's being applied to. Per this calculator, most of these people are either (a) people just retired after a lifetime of saving, or (b) people soon to retire after a lifetime of saving (i.e., ~15% of people in the US age 55-75 have $1M+).

Do you think 10%+ of people in their 50s, 60s, and 70s are taking 80+ flights per year? Do you think even 1% of retirees take that many flights? If no, then you may see why this estimate seems questionable.