> I think the majority of these algorithms are not really something you will find implementing in day to day work. And at most I can see myself using a library with one of those.

That's true but if you don't know what's possible, it's likely that you don't even look for it or stumble over it randomly.

So you should know about them, even if you never implement them. You wouldn't need to know about them in that detail for that but it's just plain fun to learn stuff like this. :-)