You hit the nail on the head. Literacy is about more than just sounding out words - understanding the intended message is equally important.
I wish I could be surprised, but I’ve been on internet forums long enough that it’s undeniable. It’s like understanding subtext (and even overt context) is a lost art. Making a short post and expecting readers to correctly “connect the dots” practically invites commenters to misinterpret things. So the choice is either “over-explain and risk making a super long post,” or “come back again and again when someone inevitably argues something you didn’t intend.” It’s so frustrating.