I think Deon whipped up some modded workshops that allow anyone to train up medical skills.
Sure, it's a mod-product but it's something worth looking into if you want to keep your doc's skilled without the use of overly-complex rooms meant to "lightly" injure people. Because sooner or later, the crazy cat lady will walk in with all of her cats, and leave with none.
Also, I'm pretty sure sooner or later Toady will allow animals to get healthcare too, but I figure it's the Animal Caretakers who will do that work. Or maybe not. Might be that their job is just going to be to keep the animals fed and so on, while doc's and etc. will do all medical work. Would be pretty useful regardless.
It's sad that I rarely get a named&titled doorstep guard animal these days, because a few months after they get a name, they die of infection from a cut toe or something. Maybe I should install a flooder to the room. Does getting water all over you help fight infections or is a proper Clean Patient job required?
Anyway. When I make medical teams, it's mostly staffed by migrant-arrived doc's of various skills. Usually I end up giving them all Diagnostic jobs because god damn doc's don't do enough even now. Some jobless dorfs end up with the Nurse job and they have to do everything but diagnostics. Haven't seen too many horrible treatment mistakes yet, so I guess it's rare for them to botch up their job completely. Well that, or a good diagnostics clears that right out and the actual job just takes longer if the dorf doing the surgery or suturing is only dabbling at it.
Although I do have one amusing medical story that came to mind. One fort of mine had a miner who had their upper spine turned to mush by a skeletal camel. Same miner later on had their LOWER spine turned to mush by yet another skeletal camel. They still ended up moving all over the place, couldn't work of course but they managed to survive. Somehow. I don't even want to know how. It's sort of a depressing mental image. We really need dwarven wheelchairs.
Also, if you REALLY must do a wrecking-room for useless dorfs to be turned into work-on patient test subjects, I suggest a good 2-3 level drop from a bridge. That should be enough to give mild injuries. Hopefully. Or you end up with a totally broken dorf from 3 levels of drop.
It's all for SCIENCE though, right?