They are the minority with a VERY small staff, compared to most others. (Also HRT engineers work a lot, not leasurely 40 hours per week)
Pointing to extreme outliers is not giving your opinion much credence. Because I can point to some people who work in crypto, that earn $600k+ without breaking a sweat - in Singapore with Singaporean taxes(which blows HRT salaries with US taxes out of the water)
$400k new grad TC, Free food, 40 hour work weeks, great company culture (many events)
Facebook this year had many intern events trying to convince people that FB > Quant, evidently the brain drain is there