"if that would be so simple I would be already alpha pimp with a houndred women in bed,
but that not what happned to me, by external exposure"
It's not simple. Exposure doesn't make it easy or simple to build confidence, it only makes it doable. It's a requirement, but certainly not a guarantee.
I'm only talking about building confidence, not about achieving personal fantasies.
You can accomplish your personal fantasies with or without building confidence (although obviously you will require something to compensate for your lack of confidence, such as money for example, and the feeling of accomplishment may be completely nullified in the process).
"95% of the time you repeat the same patterns and behaviors, and nothing will change"
If you do not learn from exposure, you will indeed not develop your abilities, and as a result your confidence will not grow.
As I mentioned above, it's a requirement, but not a guarantee.
The problem in this case is not the exposure, the problem is what you're taking from these periods of exposure.
It's the same in any other field, if 95% of the time you repeat what didn't work, your progress and your confidence will not grow, or very slowly.
"inne game is more important than you assume"
It's definitely important, but it's useless without exposure (at least if the goal is to build confidence). Even a well-balanced, clear-minded and secure individual can be clueless (and as a result lack confidence in the task) if they have no, or very few (or very limited) interactions with the gender they're attracted to. You can even see this in people who are socially very capable but crumble as soon as it's about seducing the people they're attracted to. It's not that they don't know how to interact, it's just that they lack exposure, so they lack confidence, which makes them limit their exposure, which doesn't improve their confidence, etc... You have to break that cycle, and you cannot break it by just "deciding" to be confident on command, so you have to break it by searching for exposure *despite* your lack of confidence.
And yes, it will definitely improve your chances of success if you accumulate knowledge, or work on your emotional management, or if you do lots of activities, or if you try to expand your social circle, or all of that, but all this without exposure is meaningless (at least if the goal is to build confidence in the task of seducing the people you're attracted to).
It would be like spending a lot of time and resources studying to be a doctor but not have any patient. Not only would you not build confidence, but you would not even actually heal patients. Now doctors have to wait a few years before practicing on patients, for obvious vital reasons, but people who want to seduce other people do not have that constraint, they should get exposure as soon as possible and as much as they can handle.
Of course I'm putting aside here actual psychological conditions, there are mental health issues that have to be addressed by a professional in order to improve, I'm only talking about the typical anxiety to talk to people you're attracted to.