It's ok for people to waste time building stuff they think is cool. Did it need to be a distro? No but it also didn't need to exist. I'm glad it exists though, I think it really whips the llamas ass!
That 'base' is one issue I've been thinking about with linux, I have similar concerns about the cost of everyone being able to make their own distro for their own slight variation on something else. It's not that I think it's a bad thing to pathfind in new areas, but the replication in building/supporting it all, getting users to pick between 4 similar variants of the same thing, and accounting for "you're using KustomLinux, which is 2 steps removed from CommonLinux" and all the little differences between them. It's an interesting contrast against standardization, but I can't help wondering how it would change the approachability of linux if the starting point was limited to one of the big distros and then variants are layered on top of that.