That's what cognitive dissonance is. Giving one's senses (in this case the taste buds or the ego 'I' or the mind) more importance than something factual or apparent.
> I am not convinced about the rest of the animal kingdom.
If you take consciousness to mean intelligence, then sure. If you take consciousness to be separate from intelligence and senses, being the energy or force that brings forth the signs of what we call 'life', then I see no reason to believe that every single living entity has consciousness.
The only difference is in the type of body provided to that conscious living entity. Just like how some humans are born without sight, some without hearing, some without the ability to speak. It doesn't mean they're less conscious, they still are an observer observing things through their senses.
Unless and until one can come up with a clear definition of consciousness (you don't need to, just read nyāya philosophy and you'll save thousands of years of efforts), they will not be able to get over their biases based on unintelligent thoughts and cognitive dissonance.