Or perhaps they consider the skills needed to pass the test easily to be the bare minimum needed for the job, and anyone who can't pass it quickly isn't qualified (but hey, if you learned something from it, good for you!).
But I've noticed a pattern, which is that folks who talk a lot about using these tests talk in this rather offensive way. It makes me think that companies that start off with these test have somewhat abusive attitude towards their employees - "we don't mind making you jump through hoops so we don't have to". Might not be a signal this is a great place to work.
Maybe the company could promise to solve a puzzle I submitted if I solved their puzzle? It might seem fairer.