Interstates versus secondary roads

I have a question for all of you folks advocating a vehicle in the front of several other to pull over so they can pass. Do you want me to pull over on a federal 2 lane highway with only a 2' shoulder with my school bus and several cars,trucks,semi's behind me while driving 55 mph? Maybe that school bus has your kids on board. Oh that string of traffic just came thru a stop light a few miles ago and it is 15 miles to the next town or stop light. That school bus could just as easily be an RV doing the posted speed limit. In my state school buses are limited by statute as to how fast they may run even on 70mph interstates and it is not 70mph. In my case my CDL is more important to me than some of you seem to understand.
I seriously do not understand the need of most to run 5-10 over posted limits on 2 lane roads when most of the time it is just local trips to town or work. End of rant.