I'd like to see the medical drill that costs 30,000 GBP. I'm pretty familiar with various types of medical drills (for large and small bone surgery) and I can honestly say that this seems incredibly expensive.

The comments above about the engineering are right on. Not only are the required tolerances incredibly tight, you also need to consider the sterilization of the handpiece. There's a huge amount of work that goes into ensuring that a powered instrument can successfully go through the autoclave and come out clean.

You need to use the right tools for the job. Bosch is great for putting up a shelf but not for putting in a bone screw, reaming out a hip or doing a craniotomy. I know what brand I'd choose if that was my profession (or if it was being done to me) and it's not Bosch or Dewalt.

Pay attention the next time you watch ER, House or any of the other medical shows. Sometimes they use the real stuff.