You make a good point, but it applies beyond healthcare too.
May I introduce you to the auto industry? They'd like to sell you a new car that is always on-line, accepts OTA updates, and runs the safety-critical vehicle control systems on the same bus as the infotainment controls. What could possibly go wrong? (It's ironic that among the reports of hacks and abuses over recent months, there was also a report suggesting that many customers didn't use or actively didn't want a lot of these new electronic gadgets in their vehicles anyway. The only developments that almost everyone seemed to support were the directly safety-related driver aids.)
Then we have the financial and insurance industries, whose only requirement for any software they make sometimes seems to be "minimise fraud". Obviously that's an important commercial requirement, but meanwhile, they still can't reliably do basic things like sending money from person A to person B, providing secure and usable on-line banking facilities, providing working IT for their in-branch staff, or sometimes even keeping accurate records of who is authorised to access an account or facility.