That's just a wrong statement and highly misleading to Newbies because technical analysis of the charts is pseudo-science:
If someone wants to prove the opposite, then I can suggest using technical analysis to predict the price of bitcoin, for example, in April, June, August, December 2023. I am sure that 99% of these forecasts will not match.
Yes, and even a single one is difficult to predict,
see recent giveaways.
In general, I would expect that a bet on rising BTC is more likely but that's based on Bitcoin's fundamental characteristics (Halving, limited supply, more adoption) and not on TA.
Still, some people think TA is reliable and suprisingly, all these professional traders are frequently offering tutorials / courses "How to become a succesful trader" and I don't know why these traders are not just trading, getting rich and buying a Lambo when they
have the knowledge.

<shrug>
I know I have said it many times, but once more with. "You can't fix stupid"
It's not a surprise.
Best proof: several 100 useless Altcoins (Shitcoins) with marketcaps of 100 million USD or more...