It makes me think that the r/cscareerquestions tack of forgetting everything else and focusing on just leetcode may actually have merit.
For what it's worth, I think Chris Marshall looks like a great developer and a professional I aspire to emulate. However, a lot of companies do make decisions based on metrics, keyword searches, and standardized tests like leetcode (aka stuff that misses out on the human element), so it makes sense to try and balance both if one hasn't done so already.