Sport is about competition. You basically have to be a certain age and gender to compete in a sport at an elite level. If you are female or aged under 20, you are usually expected to compete in a different level of competition. I do not see why a person aged 25, who has been training seriously for his last 10 years, should have to be outgunned by people who have decided that they needed to start taking steroids or whatever performance enhancers in the last year.
I have seen the likes of Griffith-Joyner knock a good half-second off her 100m times to give her a world record. And she took half a second off her 200m times to give her a world record. I sat and watched Ben Johnson smash the world record in his Olympic final. And I saw footage of Marita Koch run a 400m time that no other female 400m runner (apart from a Czech runner) has come close to getting within half a second. All of whom were suspected of (and only Johnson being found to have) using performance enhancers.
These athletes have had their records questioned. And there have even been calls for pre-1990s athletic records to be rescinded from records due to the dubious nature of doping back then. These days, athletes cannot have a coffee or tea without the drug tests coming back to haunt the athletes.
And whilst we look back on the South African tour by the Aussies as one we would like to forget, the team did go on to beat the English team (barely) whilst in England. I suppose the English team did have the umpires under pressure by the crowd not to award an LBW to Australia to win the match and then series 3-1. But, the Australian team managed to get through all the banter and low self-esteem to come up without any drug or technical assistance.
If we start allowing athletes to cheat by any means, it won't be long before you start seeing stuff like this: