I see a lot of people are trying to do the same thing but I don't get the differnces or why not cooperate with say build-a-whale?

Build A Whale is fine project in my opinion. However, they write about people that use Build A Whale (to my knowledge), in other words, it's not immediately compatible. I see no problem in having multiple similar projects (or curation really being sub-projects in the case of Build A Whale and LFN).

But sure it's your baby and I have no right to complain :) It's just the effort and if it is worth it when other people are doing the same.

Feel free to critique, I welcome different viewpoints. Regarding whether it's worth the effort: Maybe, maybe not. Time will tell. I enjoy building LFN and people are sometimes requesting me these types of additions. I see no reason to not add curation, or to add something else similar to other projects. I believe LFN on it's own is a fairly unique project that can stand alone, if enough people find value in it, but at the same time, I love to branch out with things, that make sense to me.

But who knows, maybe the LFN is great for creating exactly those niches and tags. One thing that frustrates me is the duplicate usage of tags i.e. there are multiple ways of saying the same thing.
#BISteemit is a great example of how to properly do a tag, it's Business Inteligence and regarding the platform Steemit. Technically however someone could use #BISteem as well and it'll be the same thing.

Yes I would say it is (but I am obviously biased). As described in the post, @paulag found people through LFN, and if I am not mistaken, LFN was among the inspirations to her wish to have a community about data and probably even the community around the tag she started #BISteemit.

Yes someone could use BISteem instead, but if they are part of the BISteemit community, there is really no reason for them to do so.

A better example would be something like comic and comics. Comics is a trending tag in itself, but comic is also being used everyday. Would it make sense to only have one tag? Yes and no.

Yes because: If people want to be a collected community, then they can start building comics as the only tag. LFN is a tool to find people for such a community.

No because: People should be able to use the tag they wish. If they feel comic is more applicable to their content (maybe it's a one of comic strip and not a comic book series). Then they should be free to use that instead.

And yet again, if you have some ideas, please feel free to reach out on Discord. It's much less asynchronous than having to write collected thoughts here every other day :P

I can't yet say, if I will bring the curation project to Whaletank or not just yet. I usually sign up later, when I have things figured out.