Well, consolidation didn't happen for decades, then it happened rapidly after the law was changed, so that's pretty clear evidence to me.
I don't think you could accuse Matt Stoller of being in the pocket of any industry, and here's a similar take from him: https://mattstoller.substack.com/p/too-big-to-sail-how-a-leg...
Also note that Holland & Knight aren't unbiased observers. They are paid to lobby on behalf of clients, and do a decent trade in the politics of shipping: https://projects.propublica.org/represent/lobbying/search?se...