We're specifically talking about somebody who came from Google, so whether that's a lot to an average person is irrelevant. Somebody making that at Google would be very inexperienced, and the fact that they left to work for much less at another company probably indicates they were struggling at Google. So this person is by no means an accurate representation of a typical Google SWE.
But the thing that the OP is talking about is specifically that they think it is nuts that said person made that much money, regardless of the fact that relatively speaking that wasn't much money for the company.
