It's pretty absurd to think there won't be sports played until there's a vaccine. And there might not be a vaccine for 2 years given how difficult it is to create one, so that would possibly mean no 2021 either according to him.
Japan and Korea have started playing their baseball leagues already. European soccer leagues are going to finish their seasons this summer. Sports are going to be played.
Once the initial wave of the outbreak is over and we have enough testing capacity and knowledge to isolate, quarantine, and suppress localized flare ups, life can get back to some semblance of normalcy, including sports.
There very likely wont be sports played in front of large crowds with a vaccine, but sports are already being played elsewhere so his belief doesn't hold much weight. Plus there's enormous financial pressure to find a way to play. College athletic departments are screwed without TV revenue from football