150kg weighted dip naturally

I've seen quite a few guys (under 80-90kg) doing 150kg weighted dips and I wonder how many of them take some PEDs? I weigh 73kg and just recently achieved 70kg dips and 50kg pull up and thought of participating in a few years in some streetlifting championship but then saw those weights.. 140kg+ dips and 90kg+ pull ups.

I'm even puzzled if I can do 100kg dip whereas these men do over 140kg, it feels to far to reach without PEDs (I don't conclude, it's just my feeling, not ego or something, I respect them)