Good point. COVID affects different people differently. Some infections are more severe than others, and we'll probably never know exactly what symptoms or manifestations they had, if any. But it's best to be cautious.
For example, a potentially-fatal heart condition called myocarditis (an inflammation of the heart muscle) can be triggered by COVID. According to
this NPR article, Florida forward Keyontae Johnson, who collapsed during a game in December, had COVID and was later diagnosed with myocarditis. The article doesn't say definitively that Johnson's myocarditis was caused by his COVID or something else, but in either case, he's done for at least this season. So it's best to be cautious.