At that point i would not speak of a "conspiracy theory" anymore, more of like a unspoken truth.
EDIT:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6327574/
>In football players, doping has recently become an important matter
>>Androgen abuse has not only a direct effect on myocardial hypertrophy and fibrosis, but can also result in myocardial infarction, arrhythmia, hypertension and dyslipidemia
>>>Herbal supplements, anti-histamines and non-steroidal anti-inflammatory drugs
https://www.theguardian.com/science/2018/aug/08/more-young-f...
But no probable connection to Doping...when the guardian sleeps...
Unless an athlete shows up that does manage to bring in serious amounts of money. In that case the lid goes on for a few years.