I strongly agree on OP's post it is very explained it well. Yes, you can have benefits of using signal services and tools but don't rely upon them. Instead, use them as your reference and you can be compared your work and research towards them. But when it comes you relying on them, I suggest NO. Just like me when I was on trading before(but now I just take my break), I used trading tools(gunbot) and also joining a hype group. But I never follow what they say instead, I always taking an advance against their plan.
If you have a good understanding of trading, it will still be quite difficult for you to select the coin to trade with. Here where the trading signals groups can help you. Since they publish 3 to 4 trading ideas per day, you can then use your knowledge to take the trade. Once you get experienced, you can then trade without the help of any signals.
What if one day when you believed too much in the signal group that you have joined but instead of having profit it was just a trap that could easily wipe out your money in just a matter of an hour. Maybe it can help to join a group but don't rely on them, instead, make them experienced so that you will gain knowledge. Gaining knowledge is very important in trading, if you have 10 streaks lose, just think it over that you will recover you lose.
Overall, it is a very good idea to join a signal group, but it could be destroyed your dream house there.