The only pro of amazon is that you can contact them months after the purchase and still get a free replacement/refund. With aliexpress I doubt they'd refund you even if you received a bag of dirt instead of your product
In my experience, Ali Express is absolutely 100% a buyers market, in every single way. I've bought random junk with a somewhat long fulfillment time, and contacted the seller just to politely ask about a time frame without in any way indicating dissatisfaction, and received groveling responses begging me to not open a dispute with Ali.
AliExpress also has strong buyer protections, which you would have seen had you ever ordered from there. You have to confirm delivery for every order else the seller doesn't get the money.
Half the time I order something from AliExpress, it's worthless junk that isn't what I wanted or way out of spec, and the confirmation thing you're talking about was a lot more limited than you're implying
To be fair, though, said worthless junk was like 1/5th the price it'd be in the USA, so it was still worth the gamble
the only major issue I have with AliExpress is how hard they make it to log in
