There are many benefits when speaking of direct grip/forearm training.
Too many people complain of forearms that lag behind, only to hear the typical recommendation of "don't use straps."
On the other hand, too many people complain of not being able to use enough weight on deadlifts (and such), because their grip is the first to give.
It doesn't have to be an "either or." You can strengthen your grip, and build your foreams, also being allowed to use straps for deadlifts and whatever else. Common sense goes a long way.