Mens sana in corpore sano.The idea of healthy minds in healthy bodies is perennial. It has been enshrined in that pithy classical form for two millennia since the Latin poet Juvenal. The Greeks and Romans were great ones for games that were often formalised into competitive sports, most famously the original Olympic games.
Nobody thinks sport is a bad thing. It is enjoyed by billions of people either as participants or spectators. In advanced societies, it keeps people fit and helps in the battle against obesity.