opening - Ruy Lopez exchange variable - Chess Stack Exchange

In the exchange variation of Ruy Lopez, why doesn't black capture using the B-pawn? As per good strategy shouldn't we capture towards the center of the board?

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Is the Ruy Lopez exchange variation suitable for a 1400-1600 rated chess player? - Quora

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Is the Ruy Lopez exchange variation suitable for a 1400-1600 rated chess player? - Quora