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.
(Edited to add! I'm writing in good intentions but I'm not a US person, in case that matters)
Updating software is not a panacea and not always the best thing to do. In industrial hardware it's often better to have a known quantity.
Especially with equipment that can cause damage or even kill people.
Even if it isn't quite that high stakes, dealing with constant random updates is a cost factor with no clear commercial gain.
This doesn't mean there can't be updates, but they need to be done on the factory's schedule, not on the schedule of some random supplier.