Staying at a company a long time isn't intrinsically and self-evidently better. For instance, switching jobs every 2-3 years will both maximize your salary and allow you to diversify your equity compensation (for more irons in the fire) [1].

Staying at a job for a while is a means, not an ends, and as such not necessarily something to optimize for.

Myself having 0 felonies makes me below average (as 8% of Americans have at least 1 felony), and I don't see myself striving to be above average in this category ;)

[1] https://globalnews.ca/news/3946085/switching-jobs-pay-boost/

I'd certainly hesitate applying an average across a broad demographic to presumably well-paid and well-educated professionals in a technical field. As others have noted, if someone has a resume of 2 year stints for no particular reason, I assume that pattern will continue. If they bring something special, that may be fine. But I'll factor the likelihood they'll be gone in 24 months into my decision making.