Yeah, this more or less completely misses the point of what a working programmer would need to be doing. I honestly can't remember the last time I had to implement a data structure for real, and not just for the hell of it because I was bored. The closest I come is generally some sort of domain-specific shell that composites some data together.

I feel like the F# community tends to be more grounded in reality. Or at least I'm more exposed to the side of it that is trying to popularize it in Microsoft, as a useful tool for Domain Driven Design and the like.