Not sure from where that 95% number comes from, but I do know several people who use TA as their main technique when they trade, and they did it very well. I can certainly say that it works, though you can also argue that it might be a self-fulfilling prophecy most of the time, however, TA is used in a lot of markets including stocks markets. So it was there long enough, not explicitly made for crypto. In fact, most strategy or analysis relies on old-school TA thing like fibonacci, rsi, ema/sma and so on.
This behaviour retells the same old story, over and over again. The majority, get caught up in the hype and excitement and buy, always late to the party, without any long term understanding of the actual risks they are taking, bouncing between exhilaration and despair, checking for tweets, posts, and updates from their trusted guru.
This doesn't mean TA doesn't work. It means they need to learn and stop being a follower.
Though I don't know where he got the percentage but more or less the number is high.
Yes, TA has long been here even before crypto was born.
But to add, TA doesn't work for most projects like pumpndump, masternode with high ROI, and the likes.
No need for TA here but mere familiarity of the project and the trading behavior. They are here for short term profits and of course for dev's pockets.