It is not interactive because the professor has demonstrated mastery of the subject matter and thoughts, ideas and suggestions of the students are an order of magnitude less of less value than that of the professors.

Some subjects are conducive to the Socratic method but hard sciences and mathematics for instance are not. Ultimately you are trying to speedrun 500 years or so of discovery and research and while motivating problems often help, sometimes you just need to read the book, listen to the lectures and put in some effort.