Earlier quoted context omitted.
Same reason regular companies cannot be banks in many countries , you would be able to give loans unfairly to your other business even if they are not credit worthy. It is wrong whether it is Best Buy or Amazon to be both marketplace and seller. Even if the controls were somewhat weak in practice, his inability to commit to that even on paper is damning.
I mean it’s like an impossible thing to commit to even if he wanted to, no?
I've no idea if anything at all will come of it, or whether anything that does will be good or bad, but this hearing wasn't just about getting verbal commitments of being good from the CEOs (despite there being several questions did ask for verbal commitments in various areas).