For a lot of traders we check haejin's graphs to see how it matches up with our own work. He often points out rock bottom opportunities or coins with incredibly bullish chart patterns that we would have otherwise missed unless we repeatedly check every single chart, every single day consecutively to make sure we caught them. (You can imagine how time consuming that is.)
If you think the TA is random, it speaks more about you. Trading is a social activity, haejin does his part by showing his work. If you don't understand it, then the posts are not for you. It's for other traders (or those willing to learn) who are already familiar with chart patterns, indicators, and elliot waves.