When answering a persons questions, it is best to start with what is known.

We can outline what observation tells us and how Einsteins equations describe them as matched by observations.
We can demonstrate how this is told by BBT.

Speculation after that fact is just that- speculation. It must be noted in full and in bold that it is speculation and not 'alternate thinking' or 'scientific theory grounded with evidence' that is rejected by meanie poopoo head mainstreamers.