Originally Posted by NWA320pilot

That is because you have never sat in the left seat and flown with a no/low experienced pilot. I can assure you that hours make a huge difference in ability and competence. The hours gained being a CFI are excellent because you are able to see others mistakes and learn from them. If flying freight or teaching others the only/best way to garner experience? No there are lots of ways as other have pointed out. But sitting in the right seat for a 121 pax operation with less than an ATP isn't asking too much. Using your philosophy there wouldn't be a minimum number of hours for a commercial or ATP certificate either. Heck even my some has minimum driving experience required prior to being able to operate a car.