Dumb article. It suggests that FI/RE necessitates high income and extreme frugality whereas it requires neither.
The first guy mentioned also is able to "bank 70% of his attorney's salary" of $260,000 which, unless the 70% is relative to his pre-tax income, isn't even frugal at all. It doesn't add up.
I don't know why the media insists on:
1. Caricaturing the movement. Everyone is either a miser, a tech-bubble billionaire, or both.
2. Focussing on literal penny-pinching and coupon grabbing, rather than things like tax mitigation, picking investments with lower management fees, careful use of retirement accounts for tax savings, knowing how to shop around (and negotiate with) service providers, etc. There are so many aspects of "frugality" that don't relate to material deprivation.