The definition from the vegan society doesn’t mention unfairness at all. it prohibits exploitation carte blanche
And exploitation, when talking about living things, implies unfairness and nonconsent
You realize the word becomes entirely useless if we use your definition, yeah? Virtually every interaction between living things becomes exploitation under your silly definition. It’s not very useful. I’ll stick with the more widely used definition, wherein it would be exploitation for Nosferatu to suck my blood, but not Mavis Dracula or her dad