There are voters and there are followers.
A Trump voter is very different than a Trump follower.
A Clinton voter is very different than a Clinton follower.
At the end of the day, yes, a vote matters. A little. But, whatever it/she/he you're following, now that has the potential to matter more than anything else.
So what are you/they voting for and what are you/they following?
Be careful not to confuse them.