Yes, the Paradox of Voting is the exact same situation [1]. My decision to vote is not rational, but I know if all the rational people don't vote that is bad, and so I focus on the other parts of voting, like civic pride and the little sticker that says "I voted"

> It may be you don't believe in democracy at all, and that's fair, but consumer action is the only way you can affect business decisions, by joining the decision-cohort you agree with more. Joining the opposite cohort because it's less work represents that you're okay with things continuing in that direction.

I actually believe even less in 'voting with your wallet' than in actual voting, for all the same reasons except the cost of 'voting' in this case is even higher (choosing an individually suboptimal option with my wallet hurts me directly even more than the cost of voting in an election does... e.g. choosing to pay more to avoid major corporations costs me every time I shop) I personally think the only way to avoid companies destroying the common good for profit is to price in the destruction to make it explicit (e.g. carbon taxes, pollution taxes, etc).

[1]: https://en.wikipedia.org/wiki/Paradox_of_voting

You have to use something more like updateless decision theory rather than EDT or CDT: consider the similarity of your thought processes and decisionmaking to all the other people in a similar situation and act so as to further your goals given that a substantial fraction of similar people will ultimately make the same decision as you.

If I ever decide that it is no longer worth voting then I will probably leave the country under the expectation that other people like me giving up on voting are doing it for roughly the same reasons.

It is pretty paradoxical and got me thinking. I don't know how to measure the value of my vote. I feel like the immediate value is less than the effort, but on the other hand, I don't think it's so simple. As you said, if no "rational" people vote, that's catastrophic and so I'm helping to maintain a larger system. Maybe a culture. Movements can have collective power no individual can have, but they can't exist without individuals. It's hard to measure the value or effects of a culture as they are often not clearly visible or direct. The effects can play out over a long time too.

About voting with your wallet, I agree that it'd be best if companies actually had to pay for those externalities you mentioned. If you have spare money to spend, you can view not choosing the cheapest option as supporting or donating. That's what I sometimes do when e.g. buying locally instead of ordering from somewhere far for cheaper. I can get local faster and it's more convenient, so there's lazyness, but thinking about it as supporting helps me rationalize it further (and it is true). I don't think it really hurts me more than buying something else that I don't strictly need. I see indirect value in trying to uphold things I like.