A doctor writes...
there are various issues with healthcare IT:
1) cheapest provider wins. You don't make software cheaper (at least initially) by debugging and ensuring security
2) interactions with the next hospital/trust/whatever your organisations are called should be easy, but they've bought a different system. No standards. Obligatory: http://www.xkcd.com/927/
3) doctors, as mentioned, are a) bright but b) don't get that there are areas outwith our expertise. IT is usually one of them (I know enough to know I don't know).
4) the users (just restricted to the doctors) go from the just got out of school, through the IT illiterate and proud of it 40-something, to the late-60s-should-have-retired-a-while-ago.
And don't expect to educate us; medical knowledge keeps on expanding and it's impossible to keep up with fields within medicine, let alone medicine + something else, where that something might be IT.
It's the white one.