Not promising?
You are not in a choice, but it depends on a habit and understanding of each indicator you use.
Every technical indicator on trading view can be used to its full potential if you master it.
Even the indicators that are quite commonly used namely MACD, RSI, MA and Bollinger are good enough for you to use if you can maximize them.
Simple indicators can be used for trading with Spot. Spot trading is best for traders because there is no risk of liquidations with Spot Trading.
If traders want to chase big profit, get rich quick, they will use Margin and Futures Trading types that are more risky to lose money than Spot Trading.
I very agree with you that professional traders don't complicate their charts and trading plans with overused indicators that are not necessary for their trading at all.
Whatever indicators they use, they all must use Stop loss, Stop limit orders to manage risk better.