Okay, what exactly is the claim you'd like me to argue with? That Bruce Schneier was a hobbyist when he developed any of his cryptographic algorithms? He wasn't

Okay, what exactly is the claim you'd like me to argue with? That Bruce Schneier was a hobbyist when he developed any of his cryptographic algorithms? He wasn't, and more importantly that misses the point since those algorithms were widely reviewed in competition settings. I'm not sure what you're getting at here. Yes, someone has to develop cryptography, just like someone has to work on designing rockets. Theoretically everyone begins an aspiration as a hobby, but that's pedantic. A cryptographic design or implementation is not going to survive as a side hobby regardless of how it begins.