Class C/D neighborhoods the most profitable?

[Reese W.]

In doing my research it seems that multifamily class C/D tends to have the best cap rate and cash on cash returns any way you look at it. From an investment standpoint it seems like a no brainer.  However a lot of the people I talk to say "ew I would never touch anything in that part of town" (including agents).  I'm not living there myself...and I have a property manager to handle evictions...so why not?  What's the down side, if my returns are better than the class A/B neighborhoods?