I’ve heard many stories about people’s orders taking longer than 2 days to arrive[a] (sometimes even 5+ weeks). When asked, they say they ordered on Amazon and are upset at Amazon for it being late. After you explain that Amazon is also a marketplace, they understand why it’s late (it’s the seller’s fault), but they’re still upset at Amazon for not making it clear enough that it wasn’t going through Prime.

[a]: I.E. non-Prime purchases (ignoring the fact that Prime purchases can also just be late)