It says you don't trust your own abilities as much as you do the machinery and quality control practices of a large ammunition manufacturer. Like so many things in American society today, you are convinced that you cannot do something as well as a commercial vendor.
I do not buy reloads, but I buy all the components to reload my own ammunition. What I load is, first and foremost, SAFE. It is also functional, accurate, cost-effective and just plain EFFECTIVE. I do not understand why someone would learn to reload, study the characteristics of various bullets, and then choose to shoot factory ammo for self-defense. That shows a lack of confidence in one's ability or in the effectiveness of the bullet they chose to load with. That is incomprehensible, to me.
Well Ive never once had a bad factory round so thats pretty much a + in my book. Ive only been reloading a couple years so I dont feel my ability has surpassed ammo manufacturers who have been making ammo probably since before your grandparents were born. However in time I may feel more confident. I do believe I can make more accurate ammo reloading by custom tailoring ammo to my gun.