Trading is good but it’s all about knowing how to trade. It’s not easy, and a few times that I have tried short term trading it usually gets things messed up and I lose money. I have also tried to follow some of these trade signals and it turned out that they are mainly scammers, they don’t give you the accurate signal, so what’s the need for it? Even the ones I see on Twitter are fake , and there is a recent news of one of them Photo-shopping his trades lol, so that he can get followers.
When it comes to trading, it’s best to do your best and learn everything, so that you wouldn’t be needing the help of anyone in doing it, seriously if you keep relying on all these people or trade bots, you will achieve nothing, unless you’re just lucky.
Trading is kind of gambling. Some win, but majority of trader lose. It's impossible that everyone would make profit. So you should only trade if you think you can beat the rest of traders. With gambling you try to beat the house (roulette, dice...) or other players (at poker for example). At trading you try to beat other traders. If most of them are better than you, you will lose in the long term.
So trading signals are not bad in my opinion because they are created by people who are experienced and probably better at trading than you are. But don't trust just a random guy at TradingView or Twitter. There's only a few groups worth following, but usually they are not free.