I can't speak for u/stabby_cicada but i've frequently run into a simple logical fallacy based on the circular reasoning that (not enough people vote for a third party so ) "a third-party will never win." Therefore people refuse to vote third-party.

If someone is not willing to get involved and organize, run for office themselves, or any one of many different ways to influence the system, voting is literally the easiest thing they can do. Even people who are actively shaking up the system should also be doing this bare minimum thing.

So if the goal is not to vote in order to protest the blah blah blah... No one will know or care about their protest unless they mention how they don't vote as often as possible.

The problem with this is its they're either seeking validation and trying to seem morally superior, or they are trying to influence others not to vote. Either way, I hate when people brag about not voting, it should be something you're ashamed of.