But the only place for this right now are some niche forums and 4chan.
Reddit and quora rely on "reputation" and vote not in arguments.
So it is more like an echo chamber.
On 4chan there is no "names/nicknames" no "reputation" or points.
Your argument has to stand on its own and will be teared apart.
The immaturity of such behaviour wears thin quickly after the first few laughs, unless you like the company of a-holes (can't think of a better term).
We have govt, companies, celebrities, teachers all so used to lying that when someone talks truth it "cracks" the social norm.
We even say that someone is "too naive" when they are honest about their opinions.
If you want to pursue real talk and truth you must be ready to some harsh exchanges.
BB.net is almost legendary for how brutally unwelcoming it is. The 10th planet forums see both a lot of hostility on the topic of practical combat and street fights, and has a huge contingent of borderline schizoid conspiracy theorists because papa Eddie never met a lizard man he didn't believe in. Reddit fitness and Instagram fitness seem to be primarily dedicated to the goal of self aggrandizement and self promotion, and they don't feel like a real place for conversation.