the few that do use bluetooth to adjust settings.
That may be the intended use, but it does not imply the system is secure.
Here's an example of an insulin pump vulnerability from a few years ago that enabled attacks from up to six meters away. Think about how many potentially-compromised devices you're ever within six meters of. The vulnerability enabled remote control over the insulin pump, which IIUC can be deadly.
My point being — it's not a good thing to be in the midst of a hacking epidemic! Real people will be harmed as a result of increased hacking.