Graham and Rodriguez also didn't coach at a place with the pressure and expectations of USC. I am not saying those schools made the right move just that firings like this happen all the time and it is less surprising at programs like USC.Graham and Rodriguez had each been in their job 6 years - how many Rose Bowls or conference titles did those guys win? ASU made a huge mistake firing Graham and hiring Herm IMO and if you think Arizona fired Rodriquez for only winning 7 games this year then you haven't been paying attention.
UCLA won the coaching carousel? If USC is more concerned with that than actually winning games then they're the dumbest program in the country - I don't think they are.
If you don't think programs see other hirings and worry then you are being very ignorant. You don't think the Oregon and Stanford coaching staffs were concerned when Peterson was brought in at Washington because I guarantee you they were. Opposing coached get in the way of you winning games so they prepare for and pay attention to these things.
All of the factors point to him likely losing his job if he only wins 8 games next year and if you want to ignore those then go ahead.