As to the dual sided example I used - I qualified it by saying “all things being equal”, because you’re right otherwise the other peripheral variables will confound the choice.If you simplify something enough it indeed becomes simple, but not particularly useful.
The reality is you're not comparing players that are the same in everything except one attribute. Even if there's just two variables,which player are you taking the dual sided player or the one that is a better kick on their preferred foot.
Assumedly it's come down to how much better on their preferred foot, which we can't actually measure and thus go on vibe. And even if we could measure it, how much better before dual sided loses to better kick. The reality is it'd depend on other variables - do they have a lot of tricks or evasiveness to get back onto their preferred foot - can they do Nick Daicos kicks which make the left foot pretty unnecessary. Now add in all the other variables, including recruiting price, age and salary.
Hine has spoken about his process with draftees. He scores them against criteria and then adds up their score. Sounds simple and good. But the thing is if you weight the criteria incorrectly or get the important combinations of attributes incorrectly you're drafting Reef McInness before Scott Pendlebury.
There’s no such thing as perfect system but refining a systems and continuous improvement must always be the goal.
Ultimately you want to be as objective as possible and minimize the subjective influence of the “vibe”