Yes they are relevant
Highly viewed and voted
These questions are by far among the top questions and answers for votes and views. They bring a lot of traffic to the site so even if the answers "are always the same" (more on this later) the amount of traffic they bring in outweighs any downside in terms of what the answers content is. @Rand mentions ...
We shouldn't exclude the entire category of questions; although they sometimes lean on the edge of being opinion-based, they don't have to be bad.
Some of them are good
I would say that Suggested order to watch entire Dr. Who? is an example of a good suggested-order question1. The OP defines very clearly what they want out of an answer (emphasis mine):