Anyone who hasn’t sat in the interviewer’s chair would be shocked at how many “Senior Software Engineers At BigCo” can’t even write a program that “displays a countdown of all even numbers from 100 to 2, each on a different line.” There is literally no baseline level of knowledge that is a given, like there is for, say, a doctor.
Sure but then why do people do leetcode hards coding brain teasers? This is like asking a journalist to write a sentence that is reversible when you just want to know he speaks English.
It strikes me as counter productive to select for memorization for a job based on research and collaboration. It's easy, but then the whole "software development is costly and error prone" problem looks self inflicted.