Really, because Manx, Mayo, and OTG are the three most knowledgeable draft gurus on this board and all of them reference workout numbers, as do the majority of the other people who invest time in the scouting and drafting period of the offseason.
You seem to like many others think that what you see on Sunday is the end all be all and judge a player solely on that, you determine that if they are effective as a rookie, they will be great but if they struggle, they are going to suck. Once you see a player on the field that is all that matters is the philosophy preached, but that does not allow for the possibility for a player to develop.
If this were 2011, I would have posted Eric Decker’s combine stats you would have told me they do not matter and pointed out that he only had 6 catches as a rookie, others would have agreed. We would have determined Decker sucks, Joker would have rated the thread a “winner” and it would have went just like this discussion about Boyce.