Not sure what Amazon could do about the products being trash though? If you feel unsure about it, why don't you go inspect the item in some store in person, instead of guessing and buying it by delivery?
Amazon sort of threw this out with the steady movement towards blending third party sellers in with products they sell directly. They made it less and less obvious and easy to filter based on seller over time, so now you have all sorts of junk from the digital equivalent of street vendors mixed with normal products, and it’s up to the shopper to figure it out. They tolerate tricks and fraudulent behavior from those sellers much more than they should.
Amazon could, if they wanted, make it easy to filter for products that have been selected by a buyer who has a relationship with the vendor, and are directly sold by Amazon themselves, but it’s seemingly more profitable to allow third parties to peddle garbage en masse.
> why don't you go inspect the item in some store in person
Because a lot of times, there isn't a local store that sells it. And honestly, a lot of the stuff at local stores is trash too, sold in packaging that makes it difficult to tell before you buy it.
Amazon could manage QC; other large stores do. (Admittedly not as large as Amazon.)
The quality/price/speed you see at Amazon & Aliexpress are market segment choices.