At some point you trust Amazon and don't care that Walmart might have a certain item $3.70 cheaper...win some, lose some is the rationale but "Amazon is cool"
Walmart at least tries. They don't succeed, but they've at least they try.
In countries with strong brand manufacturing interests, notably Italy and France, it can be very expensive if they catch you with that 50$ "Bolex" watch from Bangkok, or with fake LV gear. Fines can go into the 1000s of Euros.
They can't shield you from the disappointment of having been duped with a counterfeit, or the hassle of the resolution process itself.
You can search for foo bar on amazon.de, get some search results, one of them is from a seller in China for a product whose name whose name and function resembles foo bar. The photos may look good enough to tempt you but the text doesn't say that it is foo bar.
You and I have had very different experiences with Amazon. I am not sure where this sentiment is coming from, I have literally never seen "fake" products on there. I appreciate that there are obviously some bad actors on that site re-selling stuff, but I cannot say I have experienced them and I use Amazon a fair amount.
Do you have some examples?
and here's some from when Apple took them court for > 90% "Apple" products being fake: https://www.forbes.com/consent/?toURL=https://www.forbes.com...
I'll put it this way you'd be mad to buy something like medicine from Amazon...