This is true. But it's incomplete.
We do not have a functioning democracy. Most people feel that. Voting works when there are candidates with voting for, and votes translate into change, but when the system has been hollowed out by money and judicial capture and voting rules designed to prevent actual change, we are in a bind.
Will voting fix this? No, not singularly. So voting doesn't make a difference? Absolutely not! It's still one of our most powerful tools, even as weakend as it is!
Vote ... and March. Vote... and boycott. Vote... and disrupt. Vote... and organize your neighbors.
We can't stop voting, but that can't be our biggest or only tool. And everyone needs to understand this.
It sounds like there's no fundamental disagreement between us. It sounds like the only difference is one of attitude.
I worry sometimes that people express frustration with the state of things as though articulating what people should do might serve as a road map to getting them to do it. But getting people to do it requires understanding why they don't.