Doesn't life become unexciting when emotions stop meaning anything?

As a followup for the answers to my last question, if emotions are just simple chemical reactions that can be tampered with and controlled, don't they kind of lose their importance? People used to believe that emotions were something special, something that comes from within. Something that makes you unique. Emotions used to be the thing that separated us from the animals. Now people believe that they're just reactions between synapses, that certain molecules can be used to make you feel a certain way, and even make you think a certain way. Doesn't that kind of render all of our lives meaningless? That feeling that you and your wife have for each other, that's just nature's way of making sure you reproduce. There is no "love", there is no "hate" and there is no "joy". Everything can be simplified down to an algorithm. Doesn't that take away anything from your life? Doesn't it make you feel insignificant? How can you continue to believe this way? Doesn't it drive you crazy?