if you believe that it is fundamentally unsafe to buy health products and makeup from aliexpress, then isn't it also reasonable to believe that aliexpress shouldn't sell it? there's a "people should be free to make bad decisions" counterargument, but as a society we've decided against that: it's the reason we have consumer protection laws.

put another way: if you made marketplaces accountable for selling dangerous items like this, you would push them out of the segments that are most dangerous.