This is certainly a valid point. In the final judgment on each person how much he received does not really matter to God, but God still does choose to use people who have the necessary abilities [talents] to do the work He calls them to do. Consider the men named to lead and do the necessary work in the construction of the tabernacle in the wilderness:
"See, I have called by name Bezaleel the son of Uri, the son of Hur, of the tribe of Judah:
And I have filled him with the spirit of God, in wisdom, and in understanding, and in knowledge, and in all manner of workmanship," Exo 31:2-3
"And I, behold, I have given with him Aholiab, the son of Ahisamach, of the tribe of Dan: and in the hearts of all that are wise hearted I have put wisdom, that they may make all that I have commanded thee;" Exo 31:6
And then again let us not forget Saul/Paul who was a man very well educated in the scriptures before he really knew God. God certainly knew well why He called Paul as the man who was to write most of what we name the New Testament.
God did not want someone who simply loved Him. He wanted that but He made certain the called person had the gifts to do the required task before him. Were new gifts given? Perhaps, but the old gifts... call them natural gifts if you will... were also to be used.