I went ahead and took the FL course even though I was exempt. There is a county-owned park near me that allows some limited hunting but it requres a HSC for all users. Because I was already an experienced hunter (and a really good test taker), I finished the written exam in about 5 minutes while everyone else was still on the first page. While we were waitiing for the others, the 2 instructors and I just talked. They recognized what I knew and asked me to get involved as an instructor.
I would love to do that, but my work schedule just wouldn't allow it. I've got about 8 years before I can start thinking of retiring. After I retire, I fully intend to go get my HSC instructor certification. True, the volunteers are unpaid but I figure that it would be an enjoyable way to spend my retirement time.