First-time house hacking... Is there a bad way to house hack?

[Irene Low]

The way I see it, a brand spanking new duplex wouldn't be the smartest deal because of the high purchase price and you'd likely not cash flow, if not be in the negative. But is it better or worse than not buying anything at all? I'm really just curious if you can ever go wrong with house-hacking. 

In my mind, pretty much anyone who buys a duplex or any multi-family home is either a RE investor or an aspiring RE investor and brand new duplexes, what I would consider not typically the best/smartest deals, are still being purchased left and right. 
I'm wondering if there's something I'm missing here.
I'm trying to make sense of it- I guess if you held on to something like a brand new duplex, over time, especially after you move out after a year or so, you'd eventually cash flow positively due to increasing rents.. Yeah?