Besides hybridization we have the effects of soil quality and precipitation. Some of our trees grow well on the sandy loam soil. Others struggle to grow in the crevices of granite outcroppings. Some are tall, others are broader, and still others have long branches, which parallel the ground. In the fall, some trees have wonderfully abundant acorn crops, while others will come ripe another year.
Spiritual gifts are no different.
God has made human beings wonderfully diverse. It is God who has wired us the way we are, and then flooded us with his Spirit. The result is wonderfully unique and enriching and God-given. Paul begins his discussion of spiritual gifts in vs. 7 by using the figure of a military victory procession where the conquering general leads the prisoners of war through the streets of the capitol and distributes gifts to his subjects from the booty. Paul sees the ascension as the resurrected Christ's ascension into God's presence in glory, as opposed to his descent from heaven onto the earth in human form to redeem humanity.