The median household income in the US is $83,730 [1] - half of households are on less than that.

If you earn $100k and are willing to have the median lifestyle, and you can find a spouse that's willing, then the numbers work just fine.

Challenges include lifestyle inflation; housing costs if your six-figure job is in an expensive area; and finding a partner who's willing to be put in what is often a vulnerable and low-status position.

[1] https://fred.stlouisfed.org/series/MEHOINUSA672N

I know multiple coworkers in their late 30s to mid 40s, none of their wives work.