If common advice here is to be believed, vetting is the barricade, the last best defense against winding up in unsatisfying relationships and being hurt by users and abusers.

First off, I think this pathological pain avoidance is itself a major issue, but more relevantly to this thread, vetting is not the panacea people here would have you believe.

My title for this OP is definitely inflammatory hyperbole, because of course vetting is real, and people are constantly engaging in it when meeting new people, consciously and otherwise.

But, if we're being honest, compatibility, value-alignment, and other high-level vetting criteria are not the primary drivers of who people end up dating, at least when they're young.

The primary drivers are simply circumstance, opportunity, and mutual attraction. Beyond that, most people just are not engaging in some consciously meticulous filtering and elimination of prospects. The actual reality is people seize on opportunities as they present themselves, take risks, get hurt, and experiment again.

This illusion of principled, systematic vetting being the best way to prevent yourself from getting hurt is just false, and frankly childish, even robotic and unemotional.

The best way to protect and strengthen yourself against emotional pain is not to pretend you can vet out all risks and harm, but actually to take risks and endure them, and inure yourself to the discomfort, becoming stronger in the process.