My personal opinion is that a lot of Medical professionals are simply gatekeeping at this point of time and using legal definitions to keep changing goalposts.
However this is a theme that will keep on repeating in all domains and I do feel that gradual change is better than sudden, disruptive change.
The other doctors will still be there for you to sue.
Will you be able to source a radioactive source for your x-rays?
DIY radiation therapy would be a whole new level.
Healthcare-grade x-ray tubes to put in your (expensive) x-ray machine are not something you easily can obtain without a license.
It does require a radiologist name on the paperwork as they are the one with the radiation licence. However it is possible to get one if not a radiologist (dentists do, and radiographers have).
Being licensed to use the equipment is the hard bit, as insurance companies require accreditation which is hard to get.