Pepe Reina is the only one I've read who actually struggled with it.
Obviously he's at the older end of the scale being 39/40.
Like it is for every age group there will be anomalies and outliers.
Footballers should be allowed to play if they are feeling fine regardless of these test results. Testing these individuals is more trouble than it is worth given the likelihood of them becoming ill.
If there are 'at-risk' employees in and around the clubs and playing staffs then sure test them, but this testing of players every week and isolation for being within touching distance is hyperbolic farce