If you are interested in how things work you ask questions right? For me that is a clear Yes! Therefore I consider interesting and intelligent questions a good thing. For example if you are interested and excited in the work that you do you ask questions because you want to learn more things, faster. When you are interested in your child's education you ask how the school is doing, how good the teacher is, if that teacher is the best fit for your child, how the school is rated compared to other schools etc. You ask all these questions and many more because you are interested and because you honestly care about the answer. If you want to achieve anything you have to have enough passion and interest to ask questions.
Are you paying attention to these questions in your team? Does the majority of people in your team just execute without asking questions? If yes, that is an alarming sign. Many teams talk about innovation, employee participation and exploring interesting new options but fall short concerning taking action to really engage their teams. Sure there are teams that work smoothly and everyone knows what they need to do and there is not much need for asking questions. Nevertheless most teams don't stay together for a long time and therefore you should pay close attention to how engaged your team is.