Let's give two mutually exclusive possible scenarios and say which is more likely:
A) a legit 1300 defeats a 2700 in a standard classical time control FIDE rated game that matters to both players at least once, ever.
B) That never happens.
Both are possible, but are mutually exclusive. Which is more likely?
For me, it's B.
Last fide rated tournament ,a 1300 beaten 2 ,2200+ rated