It’s you who’s the one that starts from a false assumption and rule here.
Beerus is the one who is the moving goal post here. Not Broly. Beerus will be the one who’s strength will be retconned to stay on top of Goku. Not Broly. If Beerus moves up, Broly doesn’t move up with him. Broly is as strong as he is, which is >>>> Jiren. And <<< Prime Moro. There is no reason for Broly to be tied to Beerus’ strength because of one uncertain, guessing statement by Son Goku near the ending of the Broly movie. Goku doesn’t have to be right, and he probably doesn’t even know Beerus’ full strength.
Moro 73 > Prime Moro > Broly > Jiren.
Same arguments over and over and over again -.-
So Broly who scales to Beerus doesn't move up with Beerus lol so why didn't Beerus up scale past fusion yet LMFAO Vegito Blue = Beerus in black arc, yet Gogeta Blue Broly arc > Broly who was probably stronger then Beerus. Is Akira showing Beerus > Vegito in future arcs ? Nope, he justified it.
So let's makes this very clear, you got no leg to stand on here, cause the series never once said otherwise on Vegito statement and further justified it with Broly. And Goku saw Beerus go all out int he battle royal, he thinks Broly is probably STRONGER. And guessing statement is a moot point cause Goku saw what Beerus is capable of doing.
And uncertain ? read the definition of probably
prob·a·bly
/ˈpräbəblē,ˈpräblē/
Learn to pronounce
adverb
adverb: probably
almost certainly; as far as one knows or can tell.
prob·a·bly | \ ˈprä-bə-blē
, ˈprä(b)-blē \
Definition of probably
: insofar as seems reasonably true, factual, or to be expected : without much doubt
Goku isn't saying Broly isn't Beerus level, he is saying he is PROBABLY STRONGER then Beerus. So Broly is at least as strong as Beerus
As for Beerus, we don’t objectively know where he stands yet, but it is very, VERY likely that he will turn out to be even stronger than Moro 73, for the very simple fact that MUI Goku will (in all likelihood) be facing Beerus again at some point in the near future. Because that was the whole point of the plot of Super, that Battle of Gods had laid out for us. It’s the entire reason why Beerus woke up again from a 39 year slumber. To finally find a REAL CHALLENGE. The oracle fish prophesized that Goku and Vegeta will one day be able to rival Beerus, and thus become his true rivals. This wouldn’t be possible if Beerus is still weaker than the 3 powerhouses Goku and Co have been facing for the last 3 Arcs.
Remember Beerus’ “prophetic dream”?
Pure nonsense, the oracle fish can't include characters that haven't been thought of yet. Thus at that time it was Goku and Vegeta, but when Broly happened, Akira said it's Broly who is probably stronger. So you can bring the Oracle fish as much as you want, it's all moot considering Broly didn't appear before the statement but long after
So as I said, unless the series says otherwise, Broly is => Beerus