Some of the issues with asking the same questions over and over are:
- More interesting topics getting drowned out by the same beginner questions repeating over and over
- The questions same questions not always getting the same answers. In the end the experts won't revisit the same question for the 50th time, and beginners will start answering beginners.
- No knowledge aggregation doesn't really happen. Rather than the topic of that question getting dug up from time to time when someone asks for more clarification, and thus a knowledge base building around that topic, you might have to wade through dozens of the same question to find the one with an answer that's applicable to your situation, rather than one question that explores it in depth and may help you further way better.
As a millenial that grew up with forums, the above things are also what bother me most seeing most support groups now being on reddit, facebook or discord. Everything is just the same shallow questions repeating, no real in depth discussions, and unless you're terminally online, distilling deeper knowledge is near impossible.
On a forum you might find a thread on a topic that interests you, and has hundreds of comments, and you can choose to do a deep dive into that topic if you have an hour to waste on reading it when it works for you. On discord/facebook/reddit, if you're not always following the flow, good luck finding back things that were posted a mere month ago on a topic that interests you.