Is it better to wash your hands instead of taking them?

1 Who is considered a major Halacha arbiter of our time?
In some holy communities, it is 'God' who decides.
He wrote in his book that all the laws regarding the offering of the bread, etc., are essentially "eat politely" and that it is unnecessary to go into every detail.
But to eat politely and in each generation what is considered polite in that generation.
Does the Rabbi believe in its power?
2.
An excellent teacher and expert in sacred matters and purity gave a lesson and explained why the NTI only complicates the laws of impurity and purity and is completely useless.
A long lesson in the rules and details of the laws that most people are not familiar with, and as expected, they dozed off. Then he whispered something that the Maimonides believed was that it was actually a matter of cleanliness and nothing more.
Does the Rabbi also believe so?