I believe that, but also a lot of online calculators give insane numbers in part because they don't guide people to the right activity level. E.g. if you work an office job, you're almost guaranteed to be sedentary, but people often think they're still "active" because they go to the gym every day.

They're not.

If you account for that, a lot of the calculators make more sense, and a lot of people would be shocked at how little they should be eating.