I don't think anyone would argue that certain gear isn't important to certain types of photography - your moon shots are not going to be able to be reproduced by my GRiii.
But reading what the OP wrote, it sounds like has the gear he needs and he just keeps buying more. And that's not going to provide a solution to his issue.
Btw, I'm actually in agreement with a few things you wrote:
I pretty much never go out with the specific intention of shooting. It is always part of something else I'm doing.
Also, most work I see posted means nothing me. TBC, I'm not saying it's not well done. In fact a good portion of it is - the insects and moon photos were excellent, but neither of those subject is anything I would care to shoot or spend time looking for in an exhibit.
Of course the primary consequence of this, is that many times when I find an image I truly think is great, and I show it to someone, they almost always go, "huh?"