The are both sports. I like this from wiki:
Sport (or, in the
United States,
sports) is all forms of
competitive physical activity which,through casual or organised participation, aim to use, maintain or improve physical fitness and provide
entertainment to participants.Hundreds of sports exist, from those requiring only two participants, through to those with hundreds of simultaneous participants, either in
teams or competing as individuals.
Basketball courts are all the same size and basketball rims are all 10 feet high . That does not eliminate it from being a sport. So bowling is not eliminated simply because bowling alleys are alike.