hair loss to the point you have to wear wigs is pretty uncommon. Most people "shed" - some a little, some a lot - for many of us, it's really only noticeable to us, not to others.
I didn't lose much hair. I did notice extra strands in my comb when I combed it out after washing it, but had I just looked at my head, I would never have noticed. Some people shed to the point of getting some thin spots on their head, but again, often they're the only one who notices it.