Smell is 10,000 times more powerful than taste. Taste is 75 % smell. Why sacrifice all of smell (strongest sense tied to memory) for 25% of taste (receptors obtain only salt, sweet, bitter, sour, umami; not to confuse with flavor)? Usually, the sensation of taste is overwhelmed by smell so much that it's rendered impalpable.
Taste for me - it eases the naughty things!
www.cf.ac.uk/biosi/staff/jacob/teaching/sensory/olfact1.html