Musk is poking at a real paradox in agentic commerce: the barrier is psychological, not technical. But his comparison flatters the bot — a waiter operates inside social norms, receipts and chargeback rights, while an AI agent holding a raw card screenshot is a black box with far weaker guarantees. Frankly, calling a credit card screenshot 'the easiest way' is a rough security message; the industry answer should be scoped virtual cards and spending limits, not photos of plastic. If xAI wants Grok to become a shopping agent, trust infrastructure will matter more than the quip.