You can still have transformation through personal virtue, just read the comments above. You just can't have the same magnitude of results without the steroids.
You can have that transformation, but the issue is a person who goes on steroids and barely works out will realize bigger gains than a natural lifter who structures their entire life around optimizing their gains. Obviously the dedicated lifter on steroids will have the biggest gains, but it is a situation where anyone can get jacked by merely injecting themselves with stuff and not having an ounce of dedication.
Sadly for the casual roid user, all that bulk will fall off within a couple of months of stopping the drugs (along with other issues like elevated estrogen which can have unwanted side effects, unless they planned out a drug cycle carefully).