I want to do the SDI course not because I plan on doing lots of solo dives but to learn from the course.
It's not a "course", it's a workshop. The difference being that you bring all your honed skills to the workshop and run through them with some mild mentoring.
A course is where you bring the prerequisites and are taught new skills so you can go away and practice.
Therefore one's core skills (buoyancy, finning and trim) are a given, as is using redundant kit, handling shutdowns, in-water issues, etc. If you don't have those skills, you don't have the pre-requisites.
The 'badge' isn't the point. It's an independent evaluation and confirmation of your skills.