Why is villain playing a 3 like this?
I find it hard to think in (any) villains shoes (something that is going to block my progress for sure), so I my thinking is if villain has a 3 why is he shoving like this? I wouldn't anyway.
Its pretty unlikely he thinks he's gonna be out-kicked, so why not and try and extract (he shouldnt have any sort of read that I'm a station, although obv I am tempted by calling here)

I suppose pot odds etc he has to be doing this with a K (or bluffing) a lot more than not if a call is to be profitable.