Just forget about hunting, herding, guarding, detecting (even cancer
now), etc and so forth.

Of course, I suppose it might make a difference if you consider
rabbits "pests".

Yeah, if you're farming or gardening they might be, but I never
considered any of the rabbits that have hung around the various homes
and even offices I've lived and worked in to be "pests".

My parents had rabbits for many years - I shouldn't say they "had" the
rabbits - the rabbits just sort of used their yard.    I don't know
what they did to keep them out of the flowerbeds, but they used
something and it seemed to work.

Generally, they would just eat grass and provide hours of
entertainment for the family dog.   Their current dog is a chihuahua,
hardly bigger than the feral rabbits eating the grass, but it would
chase those things everytime it went outside - not that it ever had a
chance at catching one or would have any idea what to do if it caught
one.

Of course, it doesn't look like that cat knew what to do with them
either.

Funny thing - the neighborhood cats who roamed outdoors were ALWAYS
considered to be a pest, while the rabbits were not considered pests
at all.

Of course, if you like paw prints all over your hood and didn't mind
the occasional turd laying on the roof of your car and had no love of
song-birds, you might not consider cats to be pests.