Its a double edged sword, much like everything else.
A wise man once said you build telephones to talk to each other, but you lose the comforts of distance. You can build airplanes to fly, but the air will smell of gasoline.
In order to give, something must be taken its a fundamental law governing everything. Sentience comes with a price too, sure it makes it easier to survive by allowing us to build and farm. But animals don't have to take jobs for money to buy food, granted they spend more time looking for food, but still. That and we begin to ask questions about why we're here, what will happen in the future, things that might lead to horrible answers.