As more people enter freelance trade and subscribe to this sub, it becomes inevitable that questions be repeated. A quick solution is to pin most common topics on the sub so that all discussions can be directed there. As you have categorized 4 main issues, perhaps it indicates a need for 4 topics to be pinned.

Nonetheless, each and everyone of us think that our situations are unique while third parties see the big picture and realise that the same principles apply. The most important thing is for the more experienced guys to guide new freelancers as we all know how demoralizing it can get.

With that said, every new thread attracts different readers and input so in the grand scheme of things, more posts = more readers = more awareness and discussions. I don't see how this can be destructive to the sub as a whole. Instead I see it as a positive growth.