...it's that there's nothing easy to be done that's big enough to make a major dent...

That is true of so many issues. The Right, especially, seems to oversimplify things, and then gets frustrated when they can't do X, Y, or Z. I think it happens less frequently on the Left (but is does happen) because, as you said before, the Left is the intelligentsia, and realize/acknowledge more nuance than the Right (in general).

But, yes, the Left also does it, sometimes with -arguably- predictable consequences (like the druggies out on the streets of Seattle and San Francisco...I've walked both cities, and seen them myself). The Right just seems to do it a lot more, and even can't learn when it fails (so they double-down...which midwestern Rep governor cut taxes, and when his budget tanked, cut them more?).

In this case, the logistics are impossible, the expense is impossible, and the legality is highly questionable given current asylum law (as best I understand it). They're trying to use an M1 Abrams when they need a scalpel.