It's cursed because if you're not gonna use metric, then don't use it.

Do drams per pound of body weight or something like that. Still cursed because it's not metric, but less so.

Or do the thing that'll make everyone* happy, just use metric.

(*me, personally)

Moles are somewhat cursed, but we do need some standard number of molecules, else all our chemistry would be in insanely large numbers. May as well make it something related to the gram.

Though, in fairness, I will grant, it's one of the less metric-y units out there since atomic weights aren't perfect round numbers anyway, other than carbon.

Perhaps we could have standardised a mole as 1x10^10^ molecules. Ah well