Eh, you'd be surprised by the number of devs that simply don't know what indexes are, other than magic-go-fast-juice. I've seen people put a separate index on every column, so that "it'd be fast for all queries"...without thinking that most of their queries used at least two predicates. I've seen people go on to spend tons of time and money on things that fundamentally cannot work because they simply are incapable of thinking through the complexity of what their asking. The fact that modern systems are so fast can let someone get pretty far before hitting a brick wall.

OTOH, I'm not sure full coursework is needed for that. Just make your way through Sedgwick's algorithms book in a month or two and you're in the top 1% probably.