Ask HN: What if we don't let tech ppl interview tech ppl? Does it matter? Why?

[MarvelousWololo]

I mean if the guy/girl said they coded Java for the past 3 years. Is there anything they couldn't learn on the day job anyways? I think it's just a matter of a couple of months or years? And it is not like the girl/guy are useless in the meantime.