there are so many 10s in a shoe of blackjack. If you know how many are left out of how many cards are left in the shoe, you can calculate your probability of winning the next hand or the next few hands.
With TA, you don't KNOW anything. You are guessing what other people will do. Can you really not see the difference between knowing the probability of winning a blackjack hand and the probability of an asset's price changing? Counting cards deals in facts, these cards are left in the shoe, this many cards are left in the shoe, this is my probability of winning. TA is based on bullshit. An asset acting 1 way in the past has absolutely zero bearing on it acting that way in the future.
That doesn't change the other facts, if for some reason someone was able to read the charts because there was something making it work, there's no way they would be sharing it with other people and making it harder for them to make money (unless of course they are telling you bullshit to get you to buy from them when they want you to and sell to them when they want you to).
People that make money trading make money trading, they don't draw lines on charts and sell them to other people.
Ok, on that you are correct. You know the probability at least. Thats different from technical analysis.
Of course the one who sell technical analysis seminars mostly arent the ones who are the successful ones. Though there are traders that are successfull simply by understanding the behaviour of the masses, including news and the status of a company and you have an advantage. Of course there are some of those that made their living already and think its fine to give tips to the noobs around them. Its not like all of them keep their secret hidden because they fear losing wealth.
I see the difference you meant now though.