No, you think there would be an upside. But there's a lot more to what players can or can't achieve than the small percentage we, as fans, can see or know. So if the guys who have been playing, scouting, and coaching for 25-30 years say a young guy's potential upside is not worth the risk of losing something they know--at least for the short term--they're more likely to be right than we are. Not 100% of the time, mind you...but more likely. If you take the mindset that you always keep potential over someone who is solid, you're going to have a bad football team most of the time.
And for the record, the Cowboys have not done the same thing year after year. In fact, the last few years have been markedly better from a personnel perspective. But all the potential in the world does you zero good if it doesn't come out on the field. And the fact is that the players have not gotten the job done on the field when it's mattered. And news flash--Stephen McGee, who may be on the cut list anyway if Mike Fisher's source is correct, wasn't the one on the field not getting it done. Just sayin'...