Thats one reason but another good one is for guys running really heavy clutches as well and I'll explain. Some say with the added pressure from the Heavy Duty plates come more force on the thrust washers and bearings so during initial start up when these components do not have the proper oil pressure there has been reported instances over time of course bearing damage may occur. I have always disengaged this switch on all my cars for that reason and there has been so many times where I would be working on my car and I'm covered from head to toe it grease and don't want to have to jump in my car and get everything dirty so its nice to be able to lean in and turn the key

Joe