It's disingenuous to switch from your original context in which you, a bystander, urge listeners to believe that this is an unsolvable problem, to the context of the victim, which you aren't.

If you, the bystander, decide to take a stand rather than write this off as too hard a problem to solve, you help the victim by giving them support, and you help future victims by decreasing, however slightly, the chance that harassers will continue to believe that their behavior is tolerable.

If you, the bystander, are willing to spend time on one person who doesn't yet understand but who may be willing to think, and then to move from thought to action, your efforts gain leverage and that minuscule probability decrease becomes larger.

If you, the bystander, continue to do this, even without being a victim yourself; if you do this in places your voice can be heard; if you do this even when you gain no personal benefit, you hopefully influence the people around you to at least think deeper, and from there, to act in some way that fits with their conscience. And in doing so, you give the victims hope for a day when this isn't their norm.

It's not a clogged sink. It's also not an intractable problem.

So let's fix it.