with respect, this is just lazy, following the herd because everybody else is doing it. Somewhere around 2010, a group of xooglers started selling CTCI (Cracking the Coding Interview)

They single-handedly fucked hiring for the entire industry.

Many of my peers have found success and homes with outstanding companies with wonderful culture that have abandoned this archaic interviewing process. cling to it if you must, but it is broken beyond repair and people are starting to trend away from it.