In some ways yes. But there are absolutely differing degrees of inconsistency in a language.

Make is pretty darn far down the "deeply inconsistent and error-prone" side of things when you try to do anything correctly and reliably with it, particularly on multiple systems and across various implementations/versions. It survives because it's ubiquitous and just barely good enough.

In terms of task running specifically it does generally stay that simple for the likes of just.

The only complexity there is getting it installed on everyone's machine, but that's true of most tooling, even the common stuff given versions won't match. I solve that with Nix.