Question about the distinction between rabbinan and da'oraita (from lesson 7 of your sermon on the virtues of rabbinic teaching)

Hello,
In class, you said it was a mistake to think that there was a dichotomous distinction between rabbinic and dawaritah.
There are different levels/intensity of Doareita – 50%, 60%, etc.
I wonder why the rabbi doesn't claim that this is simply a factual question that we won't be able to explain because they themselves didn't reveal it or write it down every time they give a sermon and provide feedback on their words.
Perhaps you mean to explain that hypothetically, if we were to ask the sages who themselves gave a sermon, they would answer that this mitzvah or this halakha is 90% of the Torah because it is a strong sermon, and this is 60% because it is a less strong sermon?

Thanks in advance.