The point that is being made by the original post is that the process is bad in many companies especially when hiring senior engineers who have a proven track record and have other options. These engineers don't want to spend time and money learning how to crack the coding interview in some bootcamp. They can find work and are put off by the process some companies use and such companies are missing out on good people. Suggesting bootcamps for leetcode and whiteboarding as a solution misses the point as these are not great interview practices.