>> I realise they have 0 problems with CS fundamentals while being at the same time top experts in respective fields. I suspect your definition of CS fundament

>> I realise they have 0 problems with CS fundamentals while being at the same time top experts in respective fields. I suspect your definition of CS fundamentals is only Algos and Datastruct problems. Said experts are very good at what they do. That does not mean they will whip out an algorithmic puzzle solution on a whiteboard under pressure. I also suspect that those experts have better things to do than get a job at Google. They'd rather not go through this process. Google wants them to be there not the other way around.