I don't know how relevant it is in today's racing, but I was once told by an ex Team owner/sponsor from the 90's that there are only two type of competitors at the TT/domestic racing those that cheat, and the rest that lose.
I remember being a bit deflated at the time, especially when he went on to give some specific details which seemed to stand up under scrutiny.
It also seemed to hold water with the various revelations over the years with some of the biggest stars on what they had done, Steve Parish's revelation of qualifying for Barry Sheen being one of them for example.