> It seems pretty far fetched to claim that biology causes boys to be more interested in winning Lego programming competitions.

Why ? The "Lego programming competitions" is a detail there, the important part is "does winning at X triggers the same biological pathways as winning at Y ?" and "are men more inclined to be competitive ?".

For example men are more inclined to do dangerous activities for fun, like racing cars or rock climbing. Does it means that biology ""wants"" men to race cars, no, just that racing cars trigger biological pathways somehow perceived as more beneficial for men than female.