External examination

I heard from the police station.
There were communities whose tradition was that an external dessert was sufficient and there was no need to bring in the witness.
And somehow in recent years it's been sinking in, especially among young women.
If I understood him correctly, this is the method of the 7 Rishonim, and perhaps this is how the learned judge in Judah rules, and this is mainly the law that was practiced in those communities. It is a shame that today many women neglect it altogether because it is painful, hurtful, difficult to purify, humiliating, and it does not seem to women that this is the will of God.
And it would be better for them to return to the custom of their ancestors and not completely abandon the issue.

What is true about what he said?