I'm going to firmly push back on this. A reasonable, straightforward interpretation of AOC's quote is that "you can't earn a billion dollars" without cheating or abusing others. I'm can believe she may have meant that as hyperbole, but even if she did, PG believes "What she meant was that it's impossible to get that rich without doing something bad — without cheating in some way." He's not doing mental gymnastics to get there; it's a straightforward reading of "you can break rules, you can abuse labor laws, you can pay people less than what they’re worth, but you can’t earn that."
That makes PG very much not strawmanning. He's arguing directly against her stated position. He doesn't steelman her argument (create a stronger or more generous version of her argument and argue against that), which could have made his argument stronger.
That also means I'm not strawmanning. PG's position is exactly what I said: that it's not impossible to become a billionaire without doing something bad. He is quite clear on that. Nowhere does PG use language implying all billionaires don't cheat. Only AOC does that, if you take her words literally.
I think you're basically doing what you accused me of doing here: greatly softening AOC's position. Did Dropbox spam users' contact lists to grow? (They didn't, AFAIK, though they did have a referral program to invite friends.) This is a huge downgrade in accusation of wrongdoing compared to breaking rules and abusing labor laws.
If you soften your definition of cheating to this level, it's no longer a billionaire thing. It's an everyone thing. Does my gardener report all his cash income? Has a friend ever streamed a TV show less than legitimately? AOC isn't trying to nitpick the smallest infractions. She's trying to paint becoming a billionaire as substantially corrupt.