User blog comment:Tecku/Tecku Talks: PvZ Environment Messages/@comment-5792287-20150818094747

This may also be why they didn't make Citron into the Plant Engineer, because if he was the Plant Engineer, then the plants would be using some machinery, as he'd likely build robotic plant turrets and a mechanical teleporter, rather than magical turrets and teleporters, after all...

Tecku, I think you're onto something.