A better way would be to open your posting with a statement like "This discussion does not seem to take into consideration X, which I think is important because ...." or "I am not sure if I understand Joanna's concept of Y, which could be interpreted as either X or Z, so please clarify."
I understand that it is a male thing to speak with authority, define situation for others, don't ask questions or admit doubt - but one positive thing that I got from reading Graeber's ethnography of the anarchist movement is how far these folks go to control that tendency.
It is one thing that all lefties and progressives could learn from these guys.
PS. I agree with your idea that learning is a life-long process on which schooling can, but does not have to, be built, and that there could be substantial learning outside the school system.
Wojtek