To me Its a matter of accountability, players are always crediting their team/entourage for whatever feats they accomplish.
Unfair or not, the player gets the glory for all the team’s concentrated efforts.
If, knowing the strict rules and regulations, your team fails to comply with the drug:/doping/banned substance compliance its also on the player. Its not a matter of fairness, its a matter of the sport in general maintaining that the standards of clean playing is enforced regardless of how much any individual player is liked or disliked.