Any new technology has some benefits and some drawbacks.

Electric cars have no direct emissions but increase mining operations in certain parts of the world. Or they can be used to plow through a public gathering of people. Or with some rewiring to electrocute someone to death. If you think hard enough, you can find nefarious purposes for almost any household item that's made your life easier.

I think what's important to focus on are the "net" benefits but the outliers feed into our emotional response.