My question is why is this a question at all?
As has been said above, the governor was put on for a reason. Every engine way back to before the turn of the century has had a form of governing. The early steam engines had a flyweight governor, the early spark ignition engines are governed by lifting the exhaust valve (hit n miss).
Without a governing system the engine will run away, building rpm until it either starts to lean out and slow down because of a lack of fuel/air or it explodes internally.
The early push mowers were built very simply, and as cheaply as possible. They were basically motorcycle engines with a blade. Not to mention being 2 cycle with basically 3 moving parts can achieve higher rpm than a 4 stroke without flying to pieces. Governing came to victa with the G3 carby and they obviously never looked back.
Governing quite simply is a way of maintaining rpm regardless of load. An engine requires more fuel and air the more load you put on it.
Personally I have never seen a briggs engine without a governor. even way back, they were internally mechanically governed. The air vane governor has been around forever and a day, even the internal governor used today is based on the flyweight governor from the days of steam!
The larger problem is the lack of protection from abuse by end users on the linkages and springs, the sprint series in particular, and the end users themselves. If people didn't shove them under trees, branches etc things wouldn't get bent/broken etc. On the flip side of that, without said users mower mechanics wouldn't have a job!
