This was the case before the pandemic.

This is the only correct answer here.

Interest rates have been low for long time though. Seems you need another explanation to explain the recent increase in resignations.

A world with many changes?

Do we really have to put our finger on exactly why? Maybe it's a million small things. Maybe it is one or two major things. But maybe we'll never know.

The world was VERY different for a year and a half. In that way, any different outcome wouldn't be surprising. Would I have predicted a great resignation? No. Does it surprise me? No.