What else do you wish you had learned? In an ideal world, you could practice diving in different types of suits, with different amounts of insulation, with different styles of BCDs, in different temperatures both salt and fresh. But this is not really practical, nor would anyone want to pay the cost of something that in-depth. Yep, the course is getting you educated on and practiced in the raw basics, in a reasonably cost effective way, so that you can take it from there with your future diving and add to experience on your own.
From your first post I thought you found the course very easy and considered it pointless. Now it sounds like you may have thought you were ill prepared for drysuit diving after competing the course. If it is the latter, then perhaps there was a rush to completion that wouldn't have happened with a different instructor.
Two tangential thoughts:
- A certification card is not a license. It is just portable testimony that you have learned a specific set of skills in a specific manner. Yes, some certifications open opportunities for what others in the industry will allow you to do, while others are more like collectibles for bragging rights.
- If you are taking a drysuit course, and already have a brand/style of drysuit in mind for later purchase or rental, then seek out a course that uses that suit. Drysuit styles vary widely, and it is better to learn in what you will later use.