Bull***. That's not how stories work.
The point of foreshadowing is to be remembered after the payoff, so you think "Ah, so that's what was going on". Catching foreshadowing you missed on a second reading is satisfying too, but that doesn't make the initial moment of realisation irrelevant.
I've greatly enjoyed stories I've had spoiled, but every time that happens I still think "I wish I'd had the chance to be surprised by that".
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"I'm Commander Shepard, and you're standing in the biggest library in Citadel Space. Look me up."