One reason they might not be is that some important principles are ommited for "pedagogical"(reducing difficult) reasons.

As a result, Physics students get unrepresentative idea about physics, its power and its vision with adverse consequences to interest in subsequent classes, scientific passion and learning motivation

I. E. kinematics only teach Newton laws

2. although force- acceleration law can predict in physical events , it is not so impressive because force- acceleration are no brainer proportional quantities and students dont see the power of physics