Right, by design. But when your are talking about the phenomenon casually, because the purpose and result is the same, shrinkflation seems to suffice. Are you asking for the name of the phenomena in the context of a detailed study? For that i am not sure it has a term it’s own.
How about the companies that cause these don’t get to say whether the poisonous cloud will harm people? Some other body with relevant expertise and no financial ties with the offending company get to make that call. And treat any company who does make claims an immediate pathway to piercing the corporate veil.