I'm not sure what the term front center means.

However stem reach is has a dynamic effect that is not just pure static geometry. A shorter stem brings the weight of the arms closer to the steering axis, even behind it for traditional non-drop bars which curve backwards. A balance adjustment to the steering to correct a lean or wind gust to a particular side throws the arms' weight to the opposite side if their weight is behind the steering axis. This contributes the lean one is trying to correct. If the arms' weight is in front of the steering axis the dynamic effect throws the bike away from the lean, helping the correction instead of contributing to it. Someone learning to ride will find balance much harder even if he/she thinks the upright seating position is more comfortable.