I'm guessing because it's something most of us can relate to and that's what made me click on it. But I feel like I've read this same content in different articles, that I've found on HN, multiple times.
I like to think that it's one of the few factors that really unite the whole HN community - most of us lurkers here have gone through or will go through a tech interview at some point. So it's universally educational for the HN audience and it's not a polarizing topic.
It's also kind of like somebody posting true life pro tips because it's useful for most of us hence why it gathers so mony upvotes probably.
I'm guessing because it's something most of us can relate to and that's what made me click on it. But I feel like I've read this same content in different articles, that I've found on HN, multiple times.