I don't assume that; I simply observe that a toaster doesn't need software, that simple machines are more likely to be reliable than complex machines, and that

I don't assume that; I simply observe that a toaster doesn't need software, that simple machines are more likely to be reliable than complex machines, and that the ability to run software makes a machine inherently more complex than (say) a clockwork timer. I have no opinion on how much is too much software. But perhaps if we are employing people to write software for toasters, then we have too many programmers.