I wish this were the case, but I don't think it's true. On the one hand, real, proven experts do get called in to fix these phonies' messes. On the other, often these people succeed often enough that it devalues our labor as a whole. Finally, if employers cannot determine real experts from fake, then it means they won't pay real experts their full worth (eg 'full worth' of 100k, 5% chance it's a fake = pay of 95k).
These costs of lower trust show up elsewhere, but they are hard to quantify and make everyone's life worse.