Your history lesson ( without any of the indicators at the time , shown ) proves nothing. In other words, your argument leaves much out and is therefore invalid.
Whether Technical analysis doesn't meet "YOUR" criteria for a valid approach or not, it's being used by millions of investors, analysts, and traders every day. And if it's used that widely, it's regarded as a useful tool and employed in decision making.
By ignoring it, your're prone to increase the guessing game.... and that adds risk.