You are only telling half the truth, they told clubs that they (DFL) will make a central announcement of test results the following day (which they did, reporting 10 positive tests) and that they recommend clubs to not make individual reports to the press.
Which is a reasonable thing to do, as clubs reporting individually causes some issues, e.g. (toxic) media speculation ("they have not reported their results yet WHAT ARE THEY HIDING??") and protecting the privacy/medical confidentiality of individuals.
It certainly offers amazing exposure, but there is also the risk that people are too thick to view it with the proper context (no atmosphere, teams coming from a two month break with only a week or two of training together).