That doesn't sound like a feature I'd want to pay fees towards enabling but I'm likely missing something - what kind of up-to-$1000 purchases are you making where you might not even like the item?
How many places globally are going to accept the Amex? If you are in Europe somewhere, are you going to be able to use it to buy groceries?
Probably not, and almost definitely not at the small retailer. Amex charges are more for the retailer, so they often simply don't accept it.
Other than that, though: I'm not sure how often you even need that $1000 'no questions asked' policy. Second, return policies through the EU market (plus at least one country) are pretty good without credit card protections. It just really isn't a big concern. Finally, the culture around returning goods differs in different areas. Folks here (Norway) seem way less disposed to returning items - especially for simply not liking an item and would rather do some research upfront. (Not working as desired, defective, and things like that are a bit different, but folks still hesitate).
From what I understand amex is different from Mastercard or visa in Europe. The European limit on fees does not count for amex, or the fees are much higher. I'm not sure exactly. This usually means support for amex is lower than Mastercard or visa.
That is an obvious step 0. So I suppose there is one question asked: “did you try to return it”. It is of no consequence. If the vendor takes it back I’m happy. If not, I collect from Amex’s insurance.