Exactly. Plus you can improve the user's experience by helping them find and understand the things they are looking for in your app :)

This kind of response makes me think of the mandatory training missions that have started populating the introductory levels of many videogames - Even though movement is the same as every other game, we're going to spend 10 minutes to teach you how to walk around and shoot your gun.

I think those are fine, as long as you can skip them.

Increasingly, the option to skip is removed. If you want to play a game with your friends, you have to spend 10 minutes doing what the game tells you to do.