I think it is at least kind of good news that Tatum decided to participate. There were reports that I read where he was iffy about returning due to impacts on his future contract if he got injured. Maybe there wasn't ever a big chance of him not playing, but at least he is there.
I never really understood that. What does COVID have to do with his chance at a career-threatening injury?
1) If his conditioning was affected due to lack of available training facilities, he could be at greater risk of injury.
2) A condensed schedule of games (to try to finish things before it's too late) is known to lead to injury.
3) Covid itself has the potential to cause career-altering affects (permanent lung damage being the most common and notable).
4) If he is injured in Orlando and needing immediate surgery, overwhelmed medical institutions because of Covid may be less able to treat him effectively, potentially reducing healing and/or requiring corrective surgeries in the future.
That said, I think the collective risk is still very low for him, contractwise (and ultimately he signed on, so he probably felt so too). Kevin Durant got a 10-year max deal weeks after tearing his Achilles. Even if Tatum is so unlucky as to tear his, I think he'd still get a max rookie deal, especially considering it wouldn't go into effect until a year after any injury. Even a Hayward-level injury probably doesn't deprive him of a max -- he's shown so much that at least one team would take that gamble. If he were entering free agency this summer, it maybe could have been a different story, but he's not. (And it's good that Jaylen already signed his deal, because I could have seen him sitting out if he hadn't.)