Given that the Eastern empire survived for another 1000 years, that’s not a very strong argument.
That was my argument. Cause and effect are not simple to determine. However, a few generations ago, the *assertion* would be that Rome fell due to its moral failings. But that was a conclusion based on questionable evidence. Rome was never a terribly moral place. But likewise, most of the immorality was for those that could afford it.
At one point, I’ll note that the Roman government had to ban a common weed from anywhere near Rome, as it was common knowledge that it made a fine poison, especially by housewives tired of their husbands.
Not what you would call the most moral of people.