"How is that different than the point I was making?"
I don't know what you intended your point to be.
"It must be an intended action, at some point. I'm saying this is the beginning of all diversity. Why one action and not another?, at the very beginning? Does it all come down to individual experiences and prejudices (likes and dislikes)?"
Evolutionary processes aren't subject to intent or planning, simply by what works (survives to procreate). The majority of life on this planet is utterly reliant upon instinct (in its simplest form a set of decision trees) and makes choices based solely upon this hardwired behavior, which is affected by sensory input and health. Only some birds and mammals actually 'think' to any degree, in the anthropomorphic sense, in problem solving and make actual choices, but they are still subject to instinct, as are humans, and they can't significantly alter their offspring, save by mate selection, itself again subject mostly to instinct.
What you are calling 'choice' is a variation in output (behavior) of those hardwired instincts (which themselves vary to a greater or lesser degree across a population).
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