Good morning, @randers ...
I think the forum would be more satisfactory if there were a willingness to be forthright in answering questions. Oftentimes the real "answer" is "No. Canvas can't do that." But there seems to be a reluctance to admit that.
We may need to "agree to disagree". At least in my own experience as a fellow Community member and Canvas Coach, when I answer questions in this forum and the answer is "no", I try to be as transparent about that answer as possible. And, if the answer is "no", if there are alternative ways (although sometimes not the most ideal or efficient) something can be accomplished, I'll try and provide that information in my response. I know that many other folks here in the Community do this as well.
and sometimes the question is even declared "solved" when it isn't. I don't think that practice helps anyone.
One of the nice things about the "Accept as Solution" button is that multiple responses can be marked as a solution. In the previous version of the Community (pre- Summer 2000), it only allowed one response to be marked as "Correct". So, in the current Community interface, more than one response can be marked as a solution ... if people think that those responses help to answer the question. Of course, a response may have been mistakenly marked as a solution. If you find this is the case, you should be able remove the green border around the response. To do this, in the upper right corner of the person's response, you'll find a three-dot kebab icon. A series of menu options will appear when you click on/hover over that icon. Find the option for "Not the Solution". This will remove the green border around the person's response.
I hope this helps to clarify things a bit for you. Let Community members know if you have any questions about this...thanks!