You should not be driving if you forget you have this option in a tight spot.
As previously stated, I never use mine unless just to ensure the mechanism is functioning properly. Hope I never need it, but, if I do, when I pull the lever, I want it to work properly.
After 2 years of towing this 36ft 5er, across US and back, we never needed to use a slide to maneuver the rig. I have the CURT hitch w manual slide pull.
for me, knowing it is there is comforting. Sometimes knowing you have all the tools for any situation is like carrying an umbrella on a sunny day....just in case...