While I cannot speak for all MOOCS, I have not had the same experience. MIT's CS 6.00x course on EdX was work heavy, Udacity's Web Development course was work heavy, and even Coursera's Design of Everyday Things had participation components. In the only (barely a) MOOC that was video only, it was predominantly a "follow along with me" coding process.
For instructor lectures, I give more positive responses than negative about my anecdotes. At the end of the day, I'm human and I'm trying to enjoy my job (which students can tell if you don't). Development of tutoring systems is still in research phases as we identify knowledge components for different subjects. A history course operates different than a computer science course.
I will say EdX has produced research on instructor lecture videos. Users prefer 3-5 videos and so instructors should design courses like that. Instructors that simply upload a classroom lecture are not appropriately transitioning their material for online use. This satisfies your being able to flip from topic to topic.
I will end the Dunning-Kruger effect suggests that students are not the best at assessing what they know and that a professional instructor has a better idea of what "knowing" something means. This again gets back to my discussion on vocational vs. graduate school and again, humans are flawed, imperfect beings. While an intelligent tutoring system can alleviate this issue, humans are still building them for the foreseeable future.