I don't know about you guys, but I can't remember the last time I saw a really technical Fox and thought to myself, "Man ... I'll bet that guy's as dumb as a brick." So why are we talking about being technical vs. being smart as if you have to choose?
For the record, I don't think Melee will ever degenerate to the point where being more technical at the optimal strategy will make you win. There's too little in Melee that is truly guaranteed. A strategy is just a guideline on what inputs to perform; what you seem to be talking about is a flowchart that starts with your character, your opponents character, the stage, and what ports you two are plugged into, and then outlines frame-by-frame the exact optimal inputs you should perform to win based on their frame-by-frame inputs.
Let's temporarily ignore all the problems that would have to be overcome to create such a flowchart. Even if such a chart fell out of the sky, you're still a human being with all the shortcomings of a human body.
First, your human brain has to know that chart and keep it in your working memory. Recall that at each frame your opponent has dozens of different and distinct inputs from the control stick alone that will meaningfully affect their DI for the next several frames, each of which will therefore constitute a different path on your flowchart (SDI in particular--that's X more pixels you have to run before your fsmash tips, for example). And you have 60 of those per second. Good luck.
Second, your human eyes have to tell you exactly what path you are on. Can your eyes tell the difference between a Ganon who tried to double-jump one frame before your attack connected and one who didn't? Surely your optimal set of inputs is different in these two cases. Now how about the difference between a Ganon who held the control stick at the rightmost position and one who held the control stick at the second rightmost position? (We're talking pixel precision here.) I'm sorry, did you blink? That's 6 crucial decision trees you've missed, scrub, come back after you improve your tech skill!
Third, your human reflexes have to allow you to properly follow that flowchart. This is flat-out impossible because it takes 2~3 frames for your nerves to transmit the signal from your brain to your hand, plus however many frames it takes for your muscles to contract and perform the required action. How can you follow a flowchart and counter all options to the frame when your body isn't even capable of responding to your brain in a frame?
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Moral of the Story: Flowchart or not, you need some brains to win at this game.