[KingMob]

It's funny (and a little depressing), because HN routinely assumes that their world view, and thus, their domain expertise, transfers.

There's no shortage of tech people convinced they deeply understand law, medicine, philosophy, etc. despite never having read much on the topics.

[johnwalkr]

Most of my "favorited" comments on here are by software people with confident yet incorrect statements (usually by way of vastly underestimating complexity) about one of my domains of expertise.

I can't find it but one of the greatest show HN was a blog post about someone who was annoyed by his inconsistent shower temperature control. From memory, he spent a full weekend adjusting it, taking measurements, making graphs, and proposed "next steps" about prototyping better temperature control with microcontrollers and servo and pontificated about developing a product, of course controlled by software. He skipped the part where a bit of research leads you to the already common "thermostatic mixing valve".

[bpicolo]

The internet at large is full of armchair experts, it's not just a tech thing.

[nozzlegear]

People in tech have particularly big armchairs though.