It's very easy to see these scammers are phoney. Ridiculously easy.
But there's none so blind as those that wish not to see.
They delude themselves. Because they're in the middle of a fantasy, a dream, a storybook - that they're not ready to prick with a bubble. So they choose to believe it. I don't actually believe they really don't know. They just really don't want to.
They purposefully prey and the vulnerable who they know will be easily flattered.
Imagine you're an older woman, obese, conventionally unattractive. You've been invisible all your life to men at best, bullied and mocked by them at worst. You have depression, agoraphobia, poor social skills and don't go out much (if at all).
Ahmed from Marrakech with his boyish good looks sends you a message "hey beautiful. I hope you don't mind me saying, but you look really pretty in your profile picture 😉'
It's the equivalent of a socially awkward boy playing video games and escaping into the alternate reality. Knowing it's not real but kind of pretending and playing it as if it is , because it feeds the need for escapism into a parallel world.