[softball]

"Hogwash rhetorical, Its not my job to do the sale, all I feel my responsibility is to bring the customer into the Candy Store, and at times even go as far as to show what flavors are available. if the Candy looks yummy, but taste like shit is not my fault."

But bringing in customers who don't eat candy won't make a sale. You do that and you are a bad salesman. After all we are all first and foremost salesmen.

"Bringing the right traffic to the sponsor's door will guarantee good sales. If the sponsor is any good, he is already selling his product. I would assume that is why the aff signs up for his programme in the first place. Bad traffic = bad sales.
would you emphasize more on this?"

See my first point. If you bring a bunch of bbw traffic to an anorexic site, then you won't convert (extreme example for illustration). If you bring a fattie lover traffic to a bbw site, you will make money. I think this is a pretty simple concept.
It is your job as an affiliate to make sales. If you can't do this, find another line of work.
When a sponsor gives you fhg and all the tools to sell and you still can't make a sale, then perhaps you might consider something your talents are more suited to.