I was going to respond in snarky-kind but I'm a fan of yours Taligent so instead I'll just rephrase it so it's clearer.

> Mailing a Dropbox file directly is only hard on iOS because Dropbox makes it that way. If they offered a "send file" option <<in addition to their already existing "send link" option>> it would be one step like Android.

I'm well aware of the send link option. FileExplorer allows me to do what OP is referring to in iOS, sending the file directly to the other person via e-mail. In Android, this is a single step you can perform within the Dropbox app. There is no technical limitation stopping Dropbox from offering that feature on iOS, they just choose not to for some reason.