One could say the same (environmental cost, etc) about many foods that people eat. We don't actually need exotic vegetables or fruit, for instance, but many of us like to eat them.
One can say the same about many, possibly most, human activities.
Other animals (we are part of the animal kingdom of our planet) also effect changes to their environments, perhaps not to the scale that we hyperadaptable animals do, but still...
I don't think I'm going to worry about the environmental effect of baby milk formula production and marketing except insofar, as in the Nestlé case from the eighties, it is damaging to people.