Simple: when the word is used as cover up, to perhaps flip hot-potato on to others

A lot of times, people talk about something being simple as a way to hide some insecurity of their own. This can be tedious when you’re just trying to get things done. If the social context points to pressure and there is no real benefit in shaming someone, then people often opt to ignore it. But the sneaky consequence could be that you would be silently taking side with an incorrect state of affairs, that might bear you down at some later stage.