Do I really need a sliding hitch?

I was told the front cap design of my 5er precluded the need for a slider, but I got one anyways. I generally only use it when backing into tight spots. Then, sure enough, one day I was pulling forward making a sharp turn and guess what - I now have a dimple next to the rear glass on the passenger side of my cab. Never thought it would hit going forward. The dimple is a constant reminder to me to 1) use the slider if there is any question, and 2) be mindful of tight forward turns as well.