It's a bit different to grab a snack at the counter (that's likely partly produced in your country) than wait 1-2 months for a product to even arrive. Call it a convenience factor or whatever.
That said, I don't know what kind of labor AliExpress goods use. Haven't used them for a couple years but if I knew for sure (maybe someone here knows?) they used slave labor for example I probably would just choose to use some other company (which probably is just as likely to have unethical practices in some point of their supply chain tbf).