While I won't claim to have been taught everything about data structures, I made it through 5 hour in person "implement a prefix tree on a whiteboard"-style SV tech company interviews. I have also been able to jump into grad-level CS courses afterwards.

I feel that it was a way better investment for me than spending three months or even three years working on a CS degree would have been. In many ways it reminds me of the difference between studying Japanese at a university vs learning Chinese at an intense language school in Taiwan. Intensity brings outsized returns.