Knockoff items are poorly made, badly insulated, and are a fire hazard. They often don't meet spec, so they don't perform as well.
If you want to make a knockoff item, Apple can't stop you, but they DO want to stop people from thinking they're buying Apple cables, which ARE tested and manufactured to a higher standard. Apple is presumably willing to stand behind their products and take the flak if they're bad (I had a laptop charger replaced under a recall), but they can't be expected to stand behind the product of someone else using their branding.
So the problem really is on Amazon's end, because they're the ones giving worldwide distribution and implicit authenticity to these fake products.
I've bought cables from Anker that were MFi certified, and they were cheaper than Apple's and just as good (maybe better? Time will tell). It's not that Apple doesn't let other people make cables, but they're expected to meet spec.
Anyway, your post is basically garbage. Yes, we all know that Apple is in some respects a Veblen good, but their products *do* actually have sufficient merit that ordinary people are willing to buy them.