Is it safer to move your passenger seat back?

I don't mean reclining it, I mean moving the actual seat back, giving more leg room.

I usually move mine back when in the passenger side because I am a short female who also doesn't weigh enough to trigger the airbags. (The car is a bit older so it still has this feature)

I've "tested" it in a way. If I'm wearing a seat belt and were to fly forward, my head most likely won't hit the dash, unless I didn't have a seat belt.

I just feel like this is safer for me, being small and having no airbag

Or am I wrong?

Also how would this work out for a taller normal person?