The Starmaker writes:

I'm sorry..I appologize..I just don't get it..I just don't
understand... How does one get a license to fly a commercial
plane who throws up if he's 2 inches above the ground?

A fear of heights doesn't influence piloting. Motion sickness can be overcome
by gradual experience.

A fear of heights is no less common among pilots than it is in the general
population. Motion sickness is also a problem for some pilots during their
pilot training, but they get over it.