The Athletic did a story on Hamilton not too long ago. He talked about how since his very first day in professional baseball he was told to hit the ball on the ground and use his speed to leg out infield hits.
He admitted that he has lost a step in the last few years and thus following that strategy would put an end to his career, so he had no choice but to go up to the plate and swing as hard as he can, swinging with launch angle in mind, just like everyone else.
He'll never be a good hitter but if this new philosophy keeps him in the league for awhile longer, that's excellent. If he can get to the 2022 season, he will have ten years of service time, which is good for his pension.