You generally train for the sport you’re participating in.

Stronger in the non-important (for the activity) parts of the body makes it harder to be stronger in the important parts. And also there are many ways to be strong, as in not all muscles are the same and also your neurological ability to control your muscles may also very widely .

Also powerlifters have much less impressive bodies than bodybuilders, and without pump and proper lighting you will generally might not even recognize that a person is top powerlifter.