I don't disagree II as far as importance it depends on the person and the persons goals, generally it helps everyone to have strong grip and forearms in daily life but how much strength you need there depends on what you do for sure. I'm not using vanity in a negative connotation, if that's someone's goal more power to them, my goal is to be as strong as I can be and through good nutrition and said training I still end up looking pretty decent, it's just a difference in ideals and I wouldn't want to put someone down just because they are different as I wouldn't want that done to me.
For what its worth I have a pair of versa's (actually power grips) but I havn't used them in a long time. I'm not trying to imply they should never be used, just that if someone has an issue with any bodypart focusing on that area will help where as ignoring the issue just makes it worse over time. It's good that you work grip as it's own component I do as well.