Well, regular trips to a clinic to receive treatment that aids recovery via an injection could be an example. Quickening recovery times allows players to do the things you regard as basic, but yet key more often. I'm not talking about getting juiced up here.
Whether the scenario I mentioned is fantasy right now, isn't really the point. I'm not qualified to assess that, and I suspect you're not either.
You're talking about the spirit of the game, or what attributes comprise competitive sport. So, if you're willing to explain to me what the issue with the above scenario would be, I'd appreciated it.