It wouldnt surprise me if some idiot bodybuilders have tried something like this but it would cause havoc. Did jordan peterson run 5g a week of test and ended up quitting bodybuilding not long after? Who knows. Only thing I am sure of its drugs dont make champion bodybuilders. Essential sure, but not the sole cause of success.
Jordan said something to the effect of, "Taking 6 grams and eating 9K calories is not sustainable in the long run; I know because I've tried." I think this was a pretty long while back, when he quit he had a bout of tren cough and he got pissed off and said he was done LOL. That's what he said anyway. That cited Dallas cycle is very high but it's fact that overall dosages for some haven't been that far off those levels. It's mainly those orals and tren that aren't sustainable IMO even if it says "training days only" or "8 weeks on and 8 weeks off." But I do believe Milos when he said Nasser was doing 10 Anadrol a day for example at some point, I just don't think that was a longer term thing even for him. JMHO.
And of course you can't just drug yourself to champion level, that's absolutely 100% true. I always, always say bodybuilding is 99% genetics. It's like the first thing a dude should learn, or at least in the first couple of years

Guy at 1:21 says he has (if I understand correctly, or he "knows of," haven't followed him before) Mr O competitors run up to 250mg of tren per day and Steve says some guys run a gram of test a day off season:
=4897
I was "arguing" or debating with a couple of regulars here about tren doses LOL, I said some guys are able to take high dose of tren and other stuff like this fella says; it may seem almost impossible if we compare to "our" tolerance, even to the point of questioning if the gear can even be real, but I think it happens.