Assuming you care about clarity and not just style, there might be some feedback to take in when people don't get the gist of what you're saying until after the second heading.
Even if you want to make the writing a journey that arrives at a conclusion rather than a thesis-first argument, the presentation immediately being scattered across a bunch of embedded block quotes and long asides (your disclaimer) invites readers to lose the path, give up, and just make assumptions about the remainder.
And what always happens on the internet when people do that? Comments that miss the point and confuse everybody else about what you were saying. You're right that the other commenter could have been more responsible, but odds are that someone was going to post a comment like even if it didn't happen to be them.