If there is a second spike, then people will say he was wrong because - look, second spike.
I see we are opening borders for tourism now too. If there is a spike in cases in, say, Spain - we won't know until it is too late and, wham bam, back to square 1 or 2 if we're lucky. But, as long as the tourist industry can overcharge parents and families during August, it's all ok. Those self-employed cottage owners, restaurant owners and ice-cream vans will obviously be declaring their true earnings from now on, and so the extra taxes that they pay due to a new-found honesty can pay for the next batch of furlough. Marvellous.