Trading without indicators is like sailing a ship without a compass. That's pure blind sailing and gambling when it comes to trading. Relying on candlestick formations alone may get you a few wins but it won't last. It will eventually wreck the trader.
I agree with your statement. Without indicators and relying only with the candle stick I really think that it is not a trading and it is more of a gambling. I see some users who trade without indicators and only using trending lines and support and resistance, at some point, yes it is effective but it wouldn't last and using indicators will give you more information and accurate analysis. Beside, indicators are free why some people don't want to use it? or probably they don't know how to use it in their trades?