That doesn't really respond to what I said

but it applies to voting, we can argue about the effectiveness of voting as a tactic but people who vote are more politically engaged than the type of person described in the quote

There are many people who vote, and do nothing else, and that is condemnible. But unless you have direct evidence that the quote originates with someone who explicitly denied the effectiveness of voting in totality I see no reason why the quote would not apply to forms of political advocacy you happen consider ineffective

I don't particularly want to argue about the effectiveness of voting, beyond to say that I strongly disagree with any bright-line distinction between "electoralism" and whatever other strategies you would care to mention, and that EVERY successful movement (leftist or otherwise) that had the option had the ballot as part of their strategy.