I don't downvote for the exact same reasons I don't go around taking money out of other people's TIP-JARS.
Some people think I don't deserve upvotes.
I think some other people don't deserve upvotes.
In the exact same way,
Some people think my business doesn't deserve money.
I think some other businesses don't deserve money.
But that doesn't mean I can walk into their store and take money out of the register and redistribute (via reward-pool) it to other businesses.