As an amateur I'll never be eligible even though after a quick add up on that list I'd be at 43 points. Personally I can't see why it can't be something like "Canon Premium Service" and you spend the cash with Canon and you get the benefits. When I book an airline flight they don't ask me if it's business or pleasure to work out how many frequent flyer points I should get.
Agreed. Could I stretch the definition? I have a fair bit of Canon gear (113 points, FWIW), and I do make images as part of my profession - does Canon really need to know that I make them using a Bruker MRI and a bunch of Zeiss microscopes?
In my situation, I joined CPS (as a stills photography amateur) justified by an ownership of a video production company.
Canon's specific wording reads
A full-time self-employed individual or an employee of a professional imaging business who plays a direct role in the creation of moving or still images.
Under this definition, any employee who creates images, moving or still, for an imaging business, which can justifiably be broadened to involve medical imaging equipment, should be allowed. When filling out your profile on the website, it requires you to post your discipline, video or stills (both for me, as this company does both product and live and recorded shots). Also, it asks you your role in the business: freelance, owner, or staff. This, in my opinion, is significant because you do not necessarily need to take photos/videos if you are the owner; you just direct those who do. Additionally, staff can be loosely interpreted as well.
The next category, Neuro, is where things might get a little dicy for you. It asks both for your primary and secondary specialization; obviously, you could put N/A and be okay, but you could also correctly put down people/children as your specializations.
All being said, the place where, in my opinion, you have the best argument for being allowed CPS membership is the next category, your primary industry/media, to which you could put healthcare.
All being said, you definitely have both the skills, talent, and equipment to call yourself a member of CPS; go do it.
It also really helps if you have a video camera or two; before last week, when I bought the 100mm macro (worth 8 points) and the 85L, I wouldn't have qualified without my video gear. My video stuff, an XLH1S, an XHA1, and a bunch of small point value adapters/extendeers, gives me 24 points; before last week, I would've had 42 points, but with my video toys I had 66, enough for me to get my Platinum membership. Now, even with 82 points, I have breathing room, but the video stuff really helps. Either the gold or platinum memberships are fantastic, with the gifts, loaners, repair discounts, and free cleans paying for significantly more than your price of admission.