The context of the article is that you should work out a little each day and is about advice on how to keep basic fitness. In that case, no, steroids do nothing for you. If you go ahead and take steroids and do your (from the article) “ Just lowering a heavy dumbbell slowly once or six times a day is enough.” nothing is going to be different.
Steroids are going to help ppl who need extreme performance.
Steroids help someone who is working out intensively get 10 to 20% more out of their effort (at a trade off for health later on).
It does not do anything for someone who sits on their ass sedentary.
It’s an augmentation, not magic, and a serious athlete could beat a non-athlete even if they juiced.