Fishy, I don't know what research you're thinking she's lacking, but the statement "People are no different and some people are mean because of their parents while others are because of society" is correct. You usually hear it stated "Some people are bad and some are mad" (meaning crazy) but it is a combination of both.
I would, however, encourage you to study up on political science and economics. Your suggestion about testing breeders for their mental status, breed breed knowledge, requiring tax and work information etc. is so far from being possible and/or legal that it's laughable. Who would be in charge of monitoring this master registry that tracks the number of pups a person produces versus sells and then enters and takes their dogs away if the numbers are bad? We can't deprive people of property without due process, and I don't know where you live, but in my state, even child welfare workers who are responsible for making sure children in foster homes aren't abused are shockingly underpaid and overworked. Tax dollars only go so far, and a budget won't allow a state to monitor people the way you suggest.
Which, BTW, is where this whole thread came from. We can't enforce the quality of pit bull owners; we therefore have to affect the quantity and the conditions under which they are held.