Writing tip, if you think something is going to sound pretentious, then replace all instances of 'you' with 'I'. Usually that will help with the tone. I find I sometimes tend to assume my own personal experiences will match everyone else's experience, which usually is not the case in the end. So, instead of trying to convince people what the "right way" to bookshop is, just give your perspective as another point to the conversation.

It's not pretentious, it's true. The "Programming" section of chain bookstores would always be not-very-many shelves of "Teach Yourself X in Y Days" or "X for Dummies" books. I don't remember ever seeing any of the seminal books for noobies like "The C Programming Language" or SICP at Barnes & Noble/Borders/Chapter 11.

The part you’re missing is that virtually everyone follows virtually everything at a surface/casual level which keeps that “discovery” alive.

Yeah - it is just a simple matter of numbers as opposed to pretentiouses or humblebragging. The number of people interested in a book is highest for the surface/casual level and it is seldom that there will be enough demand for often expensive and slow to move texts. There isn't much call for say republishing of authenic 19th century surgical technique books. Maybe some casual readers would buy it at a lower price point but almost certainly not if it is several hundred dollars.

I was actually thinking of fiction when I wrote that. I’ve only rarely seen a physical store that was good for browsing technical literature.