Yeah I never felt proprietary was the cathedral, more like GNU was the target there.
The main thing I learnt from ESR was that you can, actually, do worse than Crazy Uncle Stallman.
But we got "Everyone Loves Eric Raymond", which made me feel less like the odd one out!
Understandable though, by the time it came out, the battle lines had shifted from Linux vs GNU to free/open vs proprietary anyway.