Anarchism has a long history of [advocating for abstentionism]
Yup. And a long history of being ineffectual in making changes on a societal level because of it. Statistically, it's equivalent to supporting the worst outcomes and building roadblocks to achieving the sustainable systems necessary to support humanity while dismantling unjust hierarchies. Anti-electoralism is so fallacious with the data for context that it nearly seems like a right-wing ploy to suppress leftist voices.
In fact, this meme is really on-point for this perennial problem and regular Denying the Correlative ("vote third party"). The realistic version would be "which person would you rather meet in an alley when you have drugs on you: a former prosecutor, a nazi, or an imaginary character bourgeois character with Superman Syndrome that isn't a real choice but counts in favor of the Nazi."
Too many fellow anarchists are happy in their ivory towers, pretending that inaction isn't a choice, and choosing ideological purity over using every tool in the box to keep the patient from dying while treating the sickness. There's more than enough of us to overwhelm the Right.