Yeah but I think there is a fundamental difference here. A 3D printer enables you to do things you can't do otherwise (fabricate custom mechanical parts). A pick-and-place enables you to do stuff you can already do with tweezers except in the most extreme cases. And likely do it faster than with a pick-and-place, because they require quite a lot of work to configure.
Edit: a good analogy is a homebrewer putting caps on beer bottles. You can do it by hand with a simple tool pretty easily - even capping 100 bottles at once is no sweat, really. It just doesn't make sense to have an automated bottle capping machine even if it was cheap, because it takes up space and ends up taking more effort to set up for a small run than it saves you. Pardon the pun, but the bottleneck lies elsewhere.
Edit: a good analogy is a homebrewer putting caps on beer bottles. You can do it by hand with a simple tool pretty easily - even capping 100 bottles at once is no sweat, really. It just doesn't make sense to have an automated bottle capping machine even if it was cheap, because it takes up space and ends up taking more effort to set up for a small run than it saves you. Pardon the pun, but the bottleneck lies elsewhere.