I think that's actually a really good question. It shows deep knowledge and understanding of everything that is happening during a user interaction which is essential knowledge for a webdev. Plenty of "front end developers" have no clue what an HTTP request is.
Nobody was discussing how a keyboard works, but how the web works after you press return on the keyboard. And it's sad that too many web developers in general[1] seem to have the weakest understanding of such basic principles.
[1] super-anecdotal self-selected data points from hiring and conversations
If any front-end developers do want to learn more about Internet/browser networking, I'd highly recommend the book High Performance Browser Networking by Ilya Gregorik. It looks like there's even a free version now available online:
