[crote]

Ironically, in my experience it is often the opposite. Large parts allow you to route traces underneath them or even in between pins. With small parts you often run into issues trying to attach all the required traces at all without resorting to expensive manufacturing methods like microvias.

Larger parts can often easily be routed on a 2-layer board. Got a lot of tiny SMD stuff? Yeah, 4 layers it is.