I think, By big picture you mean the psychology behind the trading. You have explained well but I am convinced that technical analysis does not work 100%. It basically depends on the individual and how they look at it.
By big picture, I mean your ability to use other tools, bring them together, make an art/product out of them. Like a carpenter or a painter does. Let's say there are 2 different traders. One of them only use TA/indicators and nothing else. The other one can use TA if he wants to but he is also able to make sense out of the major market events and world news. He understands human psychology, he read lots of books about it. He has good education, can understand multiple foreign languages, good at math even though he doesn't really need it for trading... Also he runs a business and knows how to value a business. That means he understands fundamental analysis too.
Imo, the second trader's chances of winning in the long run is like 90% while the first trader who only uses TA has like 10% chances to win. (by "winning", I mean making considerable amount of money. Like doubling or tripling the initial investment)
That doesn't mean that the educated trader can't fail. He very well may turn into a major loser.
Imagine these traders both are chess players. The first one is playing blindfolded because he only has access to one tool. (only his hands lol) The other one has all the advantages. That's the difference between them. Can the first dude win? He can if a lightning bolt strikes the same spot twice.