Capturing planets, a question of practicality.

[QuarianRex]

I had a Borg (emotionless) game saved from a couple days back. This was a quick test and I didn't want to start a new game.

I had recently conquered an enemy planet and replaced their pop with my own (for aesthetic reasons) and then noticed that the planet wasn't constructing. The planets abilities showed -100% due to happiness. Removal of pop, abandonment, and replacement of pop resulted in a happy modifier of 10% (standard for emotionless) and restoration of construction.

I am wondering if this only applies to emotionless races. I admit that I haven't tried it out much on normal races, since I haven't really had any need.