5 points
Yes, you exploit your bicycle when you ride it. The same way you exploit your knowledge of your city to navigate it. That is what the word means. There is no negative connotation because you are not exploiting an unconsenting sentient creature.
Just like how you assume for the protection of children that children are not capable of consenting to exploitation, vegans make the same assumption about animals. And since they cannot consent, we do not exploit them.