Most of the physics taught to full scale pilots is wrong.
You must have been in my ground school.[
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So much of the theory is way over the heads of most pilots. Many of the assumtions used in general practice are overly simplified, almost to the point of being useless. And as long as things are working in the normal parameters, that's fine.
While you don't need a glider certificate to fly commerical jets, it turns out that having one can help when the geese hit the fans.