Well...we all have comfort zones, so you have to go with that no matter what.
I'm just going from the perspective that if you have one pair of monitors that are clearly the "best" of the bunch AFA their sound reproduction quality...then checking mixes on less-than stellar playbacks isn't really revealing something more, but actually their deficiency may be coloring the mix in a certain way that is not as accurate as your primary monitors...which is why I say you can end up chasing the mix, though I don't think there is anything wrong with checking, I'm just saying you have to be careful not to overreact with mix adjustments for each check on each playback system.
That can have you going in circles if you are not careful.
I've known people who got obsessed with perfecting their mix for their car system...and ignoring what their HQ monitors were telling them. That makes no sense to me.....