Mo Farah's already thin story is now basically falling apart.

[Burney]

Yes to the bottom part

In her defence, a sport where technique is such a huge part of her success, I would suggest an athlete taking drugs would have less impact on an overall score than in a straight race.

Obviously taking drugs does improve an athletes performance, but to say a drugged athlete will always beat a clean athlete assumes that the drugged athlete was already in the top 4 or 5 in the world wouldn't it?

The athletes are in the top 4 or 5 based on innate characteristics. After all, you can't just take a course of injections and become the best pentathlete in the world, can you? Notwithstanding that you've cheated, you still have to work incredibly hard at your sport to climb that high. The dedication, discipline and mentality required to do that sets these athletes apart and are what propel them into the top 4 or 5 in the world. The drugs are just what push them over the line.