Hello cawacko,
Totally. Like so many things in life, you get out of this place what you put into it. It's all up to the individual. If the individual is stuck, 'plateaued' so to speak (extremely set in their view, refusing to be open to different ideas, often accompanied with strong emotion to drive away any weakness or curiosity) that type of individual will get the least out of this experience. If the individual is more open, allows their natural curiosity to lead them into previously undiscovered territory, shows a willingness to learn, doesn't pretend they 'know it all,' that is the type of individual who is more apt to learn and experience improvement.
I can certainly say that anyone here who spends as much time researching what they are posting, as they do actually posting, is most definitely acquiring both knowledge and wisdom.