Yes, for certain personages that method MAY yield fruit--( such as those with trust funds, large sums of capital, or other passive income) but what happens when the market changes? What happens when unknown black swans occur with price ( happens all the time)? How do you make a living when you are learning this one instrument prior to losing all your funds?
Going to a prop firm and learning real edge then having a team to offer different edges when the one stops working ( they all do) seems to be a much smarter and wiser use of time rather than staring at charts all day trying to see repeatable patterns to exploit. Sorry but the human mind can't predict consistently looking at flashing screens.