Is tolerance a weakness or a virtue?

Sometimes I agree with people just because I don't want to argue with them and sometimes it is because I genuinely try to see both sides of an argument. I had an argument with someone the other day about families travelling to the countryside from the city to give their children fresh air. Of course it is wrong but a friend of mine in London tells me that it is impossible to social distance in any London park. It must be so difficult so I have sympathy and have no idea what I would do in the circumstances but is it worth arguing about or do you just nod in agreement?