The OP specifically asks ‘who cares’. I imagine there are many people who care.
The ball boys and girls for whom the event is a prestigious and confidence building occasion.
The spectators for whom the event is a highlight of their summer. I agree, in light of CV, the event pales into insignificance. But that doesn’t mean people won’t care that it’s cancelled.
The direct and indirect businesses who may well rely on Wimbledon as a significant source of annual income.
The employees of Wimbledon who may now not be paid or may not be able to be furloughed as it isn’t permanent employment. I admit to not researching this but there’s no doubt they will care about the cancellation.
And last but not least, the players, who will be finding things physically and mentally stressful.
So the OP is simply an unthinking attempt to say ‘get a grip’ when the situation is far from simple. Some people should avoid commenting on subjects which are patently beyond their intellect.