You're not alone. I agree with you and a very wealthy friend of mine who owns his own company bought an MRI machine for his employees and had it installed in the building he owns.
However being well informed and questioning everything is the very best way to be a patient.
I can't think of really bad stuff to do with it (except very locally to my own building, and it's not like those are very mobile), and except maybe impersonate a medical entity and rip people off.