That's because you probably are using gmail, and Google is reading your emails and harvesting your shopping history. That's why Amazon is being secretive: to deny Google that information.

I.e you’re saying AWS values hiding data from google more than customer satisfaction.

That doesn’t sound like being customer focused or obsessed at all.

I'm ok with Google having that information. Where is the checkbox to enable including useful details in emails?

I am not using Gmail. I like having the actual order details in my email so I can keep track of various orders without needing to go to Amazon's increasingly sluggish website.

Not to mention that finding previous orders via email is much, much faster than going through their website.