They explained why in the original post.
For example, if you want them to just upgrade people through ratings, keep in mind what they would do for LeBron James. For him to have a much more lethal chase down block like he does in real life, they have to upgrade his block. Now is block is WAY too high for NO reason. Would you enjoy backing down LeBron in the paint and feeling like you're playing Bill Russell?
What about the outlet pass skill? They gave it to Kevin Love. If they wanted to just upgrade through ratings and attributes, they'd have to upgrade his passing. Now he turns into John Stockton tossing no looks to Brandon Roy in the corner for 3 pointers.
Would you want that instead?

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