Yeah, the way I read it there are three possibilities:
1) He got Covid or not this summer, but when they did the heart scan for myocarditis, he had potential issues so he's sitting out.
2) He got Covid this summer and is scared (not judging at all) so he is sitting out because he's worried about myocarditis.
3) He is just worried in general without having any real heart issue and is using that explanation instead of just opting out.
I wouldn't think it would be option 3, but you never know. I would think if he just wanted to opt out, like Parsons, he would just say so. But you never know. Will probably be more obvious when we see if he starts training for the draft before the season is over.