For ‘zoom’ I guess you mean Field of View? Having spent some time twiddling with FOV in racing sims, mightn’t it rather depend on how far your eyes are from the screen? After all, be it a car or a plane, we’re sat in a cockpit.
Maybe some insight (pun intended) can be found here:
Realistic field of view (FOV)
Cockpit camera zoom level and field of view?
Field of view calculator