I do exactly the same. I always opt for the earliest free prime delivery available, even for just one item in my order.

Fuck their Amazon delivery day and No rush shipping. “Delivery in fewer trips to your home” ? I have exactly zero fucks to give - I need my stuff as early as possible as my prime membership will let me, even if at 4 AM in the morning, because I am freaking paying for it.

And “green for the environment” my ass - I know they don’t care about environment, and I don’t care about the gas tank of their delivery vans.