So ultra-literally that is true, "resistance" does not mean "reasonable resistance", but I reject your subtext: It's a terrible comparison.

We've had literal generations of experience with vaccines, tons of data with formal systems to collect it, and most of the "resistance" traces back to "I dun wanna" and hearsay.

In contrast, LLM prompt-injection is an empirically proven issue, along with other problems like wrongful correlations (both conventional ones like racism and inexplicable ones), self-bias among models, and humans generally deploying them in very irresponsible ways.