If I see a high probability setup on the tape, it doesn't mean I have advanced knowledge of what an institution is doing - I just know that taking that trade has, over time, a positive expectancy. You can have an edge, not know in advance what institutions are doing, and it won't be a crapshoot, so your statement is incorrect.
It's not meant to be an argument; instead, it's a statement of fact. You may have an edge albeit a small one, but the title of this thread is a superior one.
It's not really inferior, since you can have a positive expectancy without that advanced knowledge, with one bonus: no jail risk! No profit-seizure risk! Financial risk on a proven trading method is way superior to the risk of trading on insider info.
Who said anything about insider information? Institutions move in and out of the market like a herd of elephants. Other animals in the jungle can sense when they are about to make those moves based on their behavior prior to the move and therein lies the ultimate edge.