Guess it's SMS engine problem then that makes creating working out of the box profiles impossible?
Not really.
For many people, AMS 2's FFB does work out of the box. You'll find plenty of people complimenting it on the official forums. I don't dislike it myself, but it's just missing some things I want. There will always be people who want to tweak, change or enhance the FFB to better suit their own needs.
The custom profiles people have made clearly show what's possible if someone is so inclined, so it's not an engine limitation. The complex profile I mentioned above adds all manner of new and improved forces, most of which go above and beyond what is needed (or for the most part, wanted) by the majority of people, including me. But it does show the potential of what can be done.
At the end of the day, it's more about design choices. Given the subjectivity of FFB, a developer will always have to choose a path and stick with it. It's never going to be a path that everyone likes.
When I got reply "not really", I just couldn't see how...
My reply was because I misunderstood what you meant. Now I understand, yes, I suppose it is a similar situation.
But to be honest, what's new? In most sims there will be people who tweak the FFB away from the "defaults" or what is "recommended" by the developer. As you say, FFB is subjective so this is inevitable. Most sims allow you to do that from within, using in-game settings. AMS 2 does not, so we have to settle for external files instead. The end result is the same.