It was never “Goff is unstoppable!” It was always “the Rams offense is unstoppable!” Jared Goff just happened to be the one in the driver’s seat. Any number of average-or-better quarterbacks could have dominated with that offense.
That being said, this is still a league where a dominant defense handles a dominant offense nine times out of 10. We saw it with the 2013 Seahawks shellacking the record-shattering Broncos in Super Bowl XLVIII, the 2015 Broncos laying waste to the Cam Newton-led Panthers in Super Bowl 50, the 2016 Patriots stopping the Falcons from scoring for the final 20 minutes of Super Bowl LI, and last year’s Patriots suffocating the Rams in Super Bowl LIII. The question is whether the 49ers or Packers have that kind of defense that can prevent these Chiefs from going off in two weeks.