Taking medical type courses (short of being a primary care paramedic or higher) as part of your application plan (that is, you plan to get hired) really only serves two purposes.
1) It allows you to answer the question, "How do you know you want to be a Medical Technician?" If you have some medical type courses you have something to talk about. "Well, I have done an advanced first aid course (advance anatomy course/etc/etc) and I really liked learning about anatomy, interviewing patients and putting on splints". More valuable is having courses, plus some experience with actual sick people. Again, it makes for a better answer to the question, "How do you know you want to be a Medical Technician?" It then looks like, "Well, I have done an advanced first aid course and volunteer with St John Ambulance/Ski Patrol/Nursing Home/Hospital. I have had the chance to treat a bunch of sick people including a fellow who we think was having a heart attack. It felt really good to put my skills to use and help someone who could not help them self!"
I suspect that it must be hard for the CFRC folks when they ask the question, "How do you know you want to be a Medical Technician?" and they get a blank stare, or the comment that it sounded like less hard than being an infantryman, or that they watched Combat Hospital and it looked like a good go.
2) It shows that you have the capability to learn and pass basic level medical training. This will not fly for CPR Level A, but if you do a Wilderness First Responder Course, Medical First Responder, Emergency Medical Responder or some other advanced sounding medical-type training where a risk of failure exists it shows that you have the capabilty to learn medical stuff.
Rest assured that when you join the CAF you will get to do Standard First Aid and CPR all over again (even if you are a First Aid Instructor) and when you show up at the CFHS Training Centre in Borden we will assume you are a retard and know nothing medical and start at square one.
So what do I want in a Med Tech candidate? Other then the above....
Someone who is fit.
Someone who is a team player and can work with other people.
Someone who can show discretion and maturity.
Someone who can self-problem solve.
Someone who is fit (have I mentioned that yet?).
Someone who can communicate orally (must) and written (ideally).
Someone who likes and can work in the outdoors.
Someone who is trustworthy.
Note I did not put high on this list someone who is a First Aid Instructor / PhD anatomist / adult-child-infant AED qualified / Advanced First Aid trained / Wilderness First Responder / etc.
If you come with the above skill set / attributes we can make you a high functioning Med Tech by teaching you the knowledge and skills you need.
Look luck with your application.
MC