So? It's only the natural position of maybe one of them. Foden can play anywhere in the frontline and in midfield, Ferràn can play the front line, Sterling can play on either wing and can fill in up top and Jesus is a striker who can play on both sides. We have more players that can play on the right (Mahrez, Bernardo, Sterling, Ferrán, Foden, Jesus +).
We have 8 + players who can play up front. Does that mean we shouldn't sign a striker?
Agüero, Jesus, Delap, Sterling, Ferrán, de Bruyne, Bernardo, Foden.