Some things in medicine require more muscle than others.
For example, being an orthopedic surgeon. Lifting large limbs, breaking and resetting bones, using drills/saws/chisels - all use lots of muscle.
I'm learning that intubating people also requires a lot of muscle. You'd be surprised at just how difficult it is to lift up the jaw and hold it up while trying to put a tube in it. Plus you have to be very careful not to break any teeth. No one wants their teeth broken. Not to mention that holding a mask on a person's face with one hand and breathing for them with your other hand requires both coordination and strength.
I write all that mostly because I've noticed my bicep/tricep strength leaves something to be desired. I guess it's time to do some sort of weight-lifting.