they were shown the door very quickly
I frankly appreciate a lot when you talk, your English sounds so elegant that I find it a pleasure to read, but I also appreciate the concept you expose since I work in avionics and we have a lot of problems in common.
I like it, because usually people in avionics don't like to talk for free, courses and the business of giving expert advice to other professionals, typically in financial and business matters, all of these things cost a lot of money as well a full training costs a lot of time.
Something like K euro. May be your boss pay it for you, may be not, may be you are a person who works freelance, thus it's all on your wallet *IF* your can invest money on it.
Someone here simply assumes that he/she can access everything everytime everywhere for free. Like when he/she clones a git repository in a couple of seconds. That's the problem of "opensource" which always introduce a distorted prospect of the reality, because of course, these kind of people believe they can access concept online, thus they have no respect when someone has the intention to talk.
The problem of modern computer science is also that even a nogooder can access internet and claim that he/she can programs something. It should be proved, in first place. I see Km of fsking garbage online.
But who cares? I am not interested to have the proof of expert skill and knowledge in a particular field from people in the topic, not interested in showing any supremacy about who is allowed to talk, and who should shut the fsking, but!
But I can't ignore that someone here comes from a more relaxed area, like Home automation, where you have light constraints and requirements to be respected in your code and you are 100% guaranteed that nobody will ever die even if you write poor quality code: never thought that these kind of people have ever felt the forum talk on mission critical field as the quality of being arrogantly superior and disdainful against them.
Thus, let me summarize: you spend your coffee-break time contributing on things that usually kept in-doors, therefore cost money on courses and consulting, and people believe that it's a manifest of your arrogantly superior.
Does it make sense? For me, they can have shown the door very quickly.