Your grip determines what the ball is going to do. Practice using different grips to get a feel for what your hands need to do.
Sacrificing natural body positions is not worth the trade-offs, whether in martial arts or golf.
"A tree is a tree, then a tree is not a tree, then a tree is a tree again" is a Zen concept that applies just as much to golf as it does to martial arts.
Golf has a lot in common with almost all sports. Being good at other sports can benefit your golf swing.