>What will happen if a decentralized Internet emerged and presented an existential threat to existing profit margins? Company lawyer would start to attack you, correct?

I think it's very misplaced concern. Commercially-viable internet will not be decentralized because of legal restrictions. If whatever engineering solution will be found to weaken them, governments will step in to curtail it. FWIW any moderately successful decentralization effort is more likely to be attacked from exactly this side: some countries will hate it for uncontrolled information dissemination, others for fiscal reasons.