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I disagree that physics concepts are simple. They are not!
Try to explain
velocity and acceleration to students. Throw in some graphs, and it
complicate matters. Roll a ball down a ramp and ask the kids when the
instantaneous speed equals its average speed for the entire trip. Even my
brightest students miss this one. This is difficult! Then do the three
hill problem (from Hewitt), with a constant slope, concave, and convex
hills. Which ball makes it to the bottom first? Few get this correct.
Still, it's an interesting question to show that velocity an acceleration
are different. And they are hard to understand!
Throw in some graphs, and it complicate matters.
The math may be the "fun" to those who "get" the math. But to what
seems like the majority of students who HATE math, the math is why
they hate science in the first place.