The goal of political marketers isn’t to get you to vote. Their goal is to get more votes than the other guy. So they obsess about pleasing those that vote. Everyone else is invisible.
Steakhouses do nothing to please vegetarians who don’t visit them, and politicians and their handlers don’t care at all about non-voters.
The magic of voting is that by opting in to the system, you magically begin to count. A lot.