Then the posts aren't encouraging them to change any behavior. This premise only works if you have partisan voters deciding not to vote because of the Both-Sidesism.
If it is the default case that a party already does not have the any votes of the largest mass of voters, then the parties should focus on gaining their support.
But also: more libertarians protested the GOP over Both-Sidesism than leftists, so technically it still had a net benefit effect for Harris. Which further demonstrates how flawed the whole premise is.