On the contrary, I believe the problem is that our subconscious is able to do this fairly well - I call it "steering" (= navigating the cue tip into the target as if it were a cruise missile). Fact is that we're able to do this a goodly percentage of the time, so we get lazy, no longer do a proper setup, are often satisfied with less than perfect alignment, especially on shots we don't deem critical. What one really wants, however, is an alignment on each and every shot that's so good that we could shoot the shot blind-folded - but then, we use our eyesight as a backup. Perfection is to make doubly sure, so to speak.
Greetings from Switzerland, David.
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„J'ai gâché vingt ans de mes plus belles années au billard. Si c'était à refaire, je recommencerais.“ – Roger Conti