Not sure if you know, but Bank of America, Paypal and others have tried this a long time ago (in Internet years). They all abandoned this idea, iirc because of the upkeep costs (?) and massive amount of fraudulent use.
I suspect the key fraud deterrent is that funds must be available in Stripe in order for the card to accept the transaction. In other words, if I issue a card via Stripe and you attempt to use it fraudulently, I'm on the hook for the transaction either way.
