if you build muscle slowly over time it is far better than building muscle quick. gains are more keepable.. tendons and ligaments have to catch up to muscle growth.
now what you say is only true in certain situations. for example.
if you never lifted before.. go on dbol and go from benching 80 pounds to 150 pounsd then yes you can come off dbol and probably still get stronger. but guess what? had you been working out before steroids you could of easily gotten to 150 as it is... but this person needed steroids to get motivated, now when they come off guess what will happen to them? they will quit 99% of the time. seen it happen all the time
has anyone on this board NEVER lifted then went on steroids and now actually look good? NOBODY has. and if you have post up before and after pics for me and what you look like today OFF STEROIDS, not when you looked like during cycle. i bet that person looks like shit today cause they quit on the gym and didn't know how to gain without juicing