It's telling for the industry as a whole that the card companies failure to do their work properly still can result in extra charges to the merchant.
After all card companies have a tremendous amount of data at their disposal and are apparently able to detect a large percentage of fraud before a dispute is raised and yet do not pre-emptively block the charges or reverse the transaction.
I've been on the receiving end of these kind of dispute resolution processes and in spite of doing everything by the book we still ate quite a few chargeback fees on charges that to us looked just as legit as every other charge that passed through. (Not with Stripe though.)
They optimize this for max profit. Of course. So they found that this is the sweet spot, that generates the maximal volume while keeping fraud to minimum (also keeping users as happy as they can - that is not bothering them with preventative measures, and then of course making it easy to do chargebacks).
After all card companies have a tremendous amount of data at their disposal and are apparently able to detect a large percentage of fraud before a dispute is raised and yet do not pre-emptively block the charges or reverse the transaction.
I've been on the receiving end of these kind of dispute resolution processes and in spite of doing everything by the book we still ate quite a few chargeback fees on charges that to us looked just as legit as every other charge that passed through. (Not with Stripe though.)