Enhanced Sports.

[Lods]

Lots of blokes in that scene had unnatural physiques and eyes like pickled onions on a fork.  I was quite proud of what I could achieve without drugs and I think that probably applies to most athletes.

That's very true.
It boils down to a choice thing.
I think a lot of athletes who chose to go down the drug route probably justified it by saying to themselves that "everyone else is doing it."
For the 'natural' athlete it can be a little frustrating competing against guys that make a massive improvement in size and performance over an off-season, especially when you've worked your backside off for minor gains.

It's probably worth noting that as Magnussen states in the article....to challenge these records you have a high level of talent and ability anyway.
You can't just walk off the street, dope up, and break world bests.

For the average athlete it may be the difference between competing at 'B' grade level rather than 'C' grade.

Magnussen's bests were set 10 years ago.
Even if he has kept reasonably fit I think he may struggle to even reach his previous levels...but it will be interesting to see.