Perhaps beside your point…but not beside mine.
In the abstract, I would generally agree with this statement. However, we are discussing this matter in very specific contexts: biblical, and even more specifically, the words of Christ.
The point Jesus was making only makes sense if Adam and Eve were historical. In His argument against the use of Moses’ commandment to justify divorce Jesus said:
“…from the beginning it has not been this way.” Matt 19:8
If it was actually some other way from the beginning, HIs argument falls apart.