I'm Australian and cannot legally vote in US elections. So instead of voting against Trump, I campaigned against him online by telling people to vote for Harris. And campaigned for more refugee visas here in Australia.
I fully agree with your source that voting will not effect change.
It is advocating for voting as a means of preventing things from getting worse
These two statements seem contradictory? Also, please see my other source. Like I reject the notion that voting is truly a method of preventing things from getting worse. IMO, voting is a pressure valve that directs righteous anger against the system into impotent non-action within the system.