Yeah, exactly that. "Vote with your dollars" moves your political power to the capitalist consumerist realm, and strips it of so much of its power.

Using food safety as a simple example: vote for food safety regulations (vote with your vote) or don't buy from companies that poison people through negligence (vote with your dollars). Which world would you rather take your elderly grandparents out to dinner in?

Voting with your dollars is a pale shadow of your actual voice in a democratic society.