"Move fast" thing applies to lots of software because most software belongs to "fundamentally safe" class of things, along butter knives and clay sculptures. People might temporarily experience sadness if they were served a mangled butter knife or saw your sand castle collapse, but they shouldn't be hurt. You don't even have to have heard of the word "functional safety" to be safe with those. Your creation is going to be default safe and perpetually safe so let them crash and burn, is the idea.

If you were writing pieces of self driving code or were building a wooden chair for yourself to sit on, that change up things a bit. The most fundamental distinction isn't in whether it's hardware or software, but whether it's safe or not.