There are credible arguments for both ends of the spectrum...
That is a subjective opinion. It is difficult to have a credible argument without any credible evidence. Just sayin...
The investigations into the Kennedy assassination were bungled badly enough that your statement applies both ways (the evidence against conspiracy and the evidence for conspiracy).
Yes, I believe that it matters greatly how this case is interpreted. There will always be controversy regarding the assassination. However, when a majority of the people distrust the government it is detrimental to the society in many ways. It is one thing to be skeptical and ask for verification. But quite another thing to immediately distrust everything the government does. How can we improve the situation? I wish I knew!
I don't think there's anything "we" can do to solve that problem.
What the government, the news media, and other institutions need to do is quit lying to us and perform better at their jobs when it comes to serving the Public.
The JFK assassination is one event, but there were many events that followed where the government and it's allies in the news media haven't told us the truth about certain matters.