I think it would be more Biblical to suggest that every Bible character had major flaws so that no one could boast and God would receive all the glory. To say that he chose the foolish because that is all he had to work with presumes that God has created a fallen creation.

1 Corinthians 1
26For consider your calling, brethren, that there were not many wise according to the flesh, not many mighty, not many noble;

27but God has chosen the foolish things of the world to shame the wise, and God has chosen the weak things of the world to shame the things which are strong,

28and the base things of the world and the despised God has chosen, the things that are not, so that He may nullify the things that are,

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