There is a difference between 3D-displaying technology and 3D; and this guy doesn't seem to get that.
I totally agree with him that "if [people] see poor quality 3D it can put them off". But that only relates to 3D technology. For example, Madden on the 3DS was widely panned as headache inducing, because of the poor 3D tech implemented.
However, there is a LOT of 3D technology out there, and it will only get better. And that's why I think this guy's main point is totally wrong.
"Only add 3D where it makes a difference to the gameplay experience. It must add something. Don't just add depth for the sake of it."
What a stupid quote. 3D is a technology that was invented millions of years ago when the first squirrel grew two eyeballs. You don't just close one eye when watching an opera, and then open both of them when "it adds something".
If the technology is effective and affordable (for both the producer and consumer), then it should be used for ALL content.