To further split this hair, there was always a 35-50 point difference between whatever his batting average was and his on base percentage no matter where he was in his career. The year he had a .414 on base percentage, his batting average was .372. The year he had a .396 OBP, his batting average was .351.
To your point, yes, he did think this were the best way to get on base. He wanted to put pressure on the defense.