Still a long time to go till the season is due to start to there is still hope. But I agree if more players test positive it will be very difficult to justify starting the season on time
I'm going to have to take issue with your assertion that there's "still a long time to go". Pre season begins on 8/13, which is less than 2 months from now. And they will have to spend several weeks preparing for those games.
They could just cancel all pre season which would push things back to the regular season start on 9/13, which is less than 3 months from now.
It's a bit of a balancing act. Cancel pre season and all practices, then show up for regular season and you run the risk of injuries due to lack of conditioning. (yes, these guys stay in great shape all year around, but there is no substitute for 'game' conditions and speed.)
I hope you're right, and time will tell, but I don't have a good feeling about it.
IMO, the biggest problem is the age group we're dealing with here. i.e. young people. It's become clear during all this that younger people just don't take it seriously and/or just don't care if they infect the elderly. Case in point: Dak Prescott, Dallas QB1. Widely regarded as being very mature for his age, serious, focused and team oriented... unlike Zeke who is the opposite. Dak threw a party, that was catered, for a very large group of people just a few weeks ago. Of course pictures leaked and it was clear there were no face masks or social distancing. Now, imagine what those less mature than Dak are doing.