You have it wrong. The stakes are actually higher for the ice cream machine. Inproper use of the ice cream machine could kill dozens. A pacemaker malfunction

You have it wrong. The stakes are actually higher for the ice cream machine. Inproper use of the ice cream machine could kill dozens. A pacemaker malfunction would just kill one at best. It's why airliners need to have triple redundant systems, doubke fault tolerant. Medical devices only need to be double redundant, single fault tolerant. I (dont) love it when people whonhave not ever designed a real medical device that's actually on the market make claims about what it's like to design a real medical device that's actually on the market.