Yeah, I don't operate software controlled heavy machineries, but it's not comforting when I update a physically moving machine and it makes different sounds than before due to altered algorithms and parameters.

Also, it's not considered a huge issue in smartphones and laptop computers, but updating firmware on Flash ROM degrades its performance such as data retention periods. Firmware updates are not always a rocket surgery, but like a surgery, not without risks. I think advocating frequent updates to all types of electronics is slightly irresponsible.