Technical analysis increases the chances of predicting the price chart right, it also boost your profit since it's much better rather than just simply deciding a random trade and hoping for a big profit, that would give you only frustration and depression leading to a much more difficult situation in your trading career.
And this is more precisely very useful for those who make short-term investments or trades. In other words, you don't just buy and hope to make a profit with a blind eye to market movements.
I personally do not believe that it would be terrible, we could maybe try to look at it different ways sometimes, because even though TA is a great way to see how it goes, news are not that terrible neither because while it looks one day on TA, a news could make it go the other way around. So always be open for other stuff too.