There is brain power by the ton all over the place. The answer cannot be based on what a thing can do, but on what a thing chooses to do.
I'm not sure I'm following you, what do you mean? That other animals as well have enough brain power for consciousness?
The verb "chooses" here does a lot of the heavy lifting, and implies a consciusness that chooses. It's making the answer circular and it means that we are just pre-filtering the possible answers for our preconceptions.
My cat is not "less conscious" because he's choosing to sleep all day.