I liked the article and kudos to reaching top of hacker news.Your article however does not consider real world problems like - What if this technique becomes popular and now there is LeetCode db for your question? In that case its really easy to just know the answer and get far. - Same for reading the code part. Most interviewers have a set of questions they go with to be fair or what not however once you know the code snippet in question you can talk about it.

The real issue is that one approach does not work for all and there need to be uniqueness to every team so an avg candidate cannot just hack the interview process. This is the problem with the current system as well since everyone uses it and its become its own nemesis.