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Irrelevant. My only point was even if you did somehow manage to get to the center of the planet you wouldn't be floating around in zero gravity.
That is technically kinda true. Been a while since I was in my calc classes, but go look at some of newton's original proofs where he wrote equations to show the gravitational pull between any two objects could be simplified to just calculating the distance between their gravitational centers, because the gravitational pull between two perfect spheres is the same regardless of their size. In those equations it's also readily apparent that this only works if you exclude situations where the boundries of the objects overlap, such as one object inside the other.
There's more nuance to it and planets aren't perfect spheres, but gravitational pull certainly goes down and approaches 0 as you approach the center. There's a second gravitational formula that exists for the situation of one object inside another if you're curious to plug in the numbers yourself.