There are some ways it benefits the network, but 'til there. You aren't voting for anything if you run your own node.
You are forgetting that by running a node, you are enforcing, or "voting" in this terminology, on the consensus rules, the chain tip, etc.
True there's no danger threshold like mining has, but if a significant percentage of nodes are "voting" on a different chain tip or different rules then that's a sign of a big consensus problem.