The difficulty is we don't know what happened in the first planck second after the big bang, let alone before the big bang (if that's meaningful).
We haven't unified quantum mechanics and relativity. Hence we can't be certain that singularities exist, or that the universe started off in a singularity.
I'm aware. What I'm saying is if that's how much you don't know, you'd better not make any claims like "X can't be accurate because it doesn't match what I think I do know".
The difficulty is we don't know what happened in the first planck second after the big bang, let alone before the big bang (if that's meaningful).
We haven't unified quantum mechanics and relativity. Hence we can't be certain that singularities exist, or that the universe started off in a singularity.