Are you sure you understand how double-spends in Bitcoin work? If you did, the right response would not be to double-down and engage in false dichotomies where a single double-spend of any transaction ever is a 100% disaster, and instead, adopt the more nuanced perspective that a few double-spends will not kill the currency, will save vast amounts of computational resources, and users can opt into however much security they require by waiting an appropriate number of confirmations.