Republicans love to use rhetorically to claim everyone else needs to shut up because they have the mandate.
Republicans also love to completely ignore the popular vote when they lose it, just like they did when Trump lost the popular vote in 2016. Anyone who isn't a MAGAt and hears that argument and takes them seriously is either ignorant or are being obtuse.
I'm not saying that people shouldn't still vote, they certainly should but for more practical reasons like getting leftists elected to local and regional offices wherever that is possible.
If you live in a Red State, and in a Red county, and in a Red Township, your vote likely won't mean a whole lot, but you should still do it, but not because you can throw it back in a Republicans face when they lose the popular vote because they quite literally do not care.