I agree that it's far from what is needed in everyday tasks, but in defense of that process: if you are unable to implement fizzbuzz, Fibonacci numbers, etc., I am almost sure you can't understand react sagas or dependency injection properly. Mixed with more open-ended questions (why was React built? how does it compare to Angular? What's a generator function?), I believe this isn't the worst type of interview.

See the other side: a significant number of applicants can't implement fizzbuzz, Fibonacci sequences or anything, but ask for ridiculous salaries and their portfolios appear to be mostly borrowed plumes. We need a process that isn't too time-consuming to id the chaff, allowing for false negatives (people who are good at Fibonacci numbers and interview questions, but not much else), but keeping the false positives low (I explain the Fibonacci sequence first so it doesn't become a math riddle rather than a programming task).