Nope! Like I said, I often just use Bluetooth to send files. That requires neither an app nor a visit to a website.
I am really miffed that this is your exact takeaway from what I said. I gave you a way that someone can do this:
* I have a file on a device I own.
* I wish to send it to another device.
* I send it.
Yes, it is in fact just as easy to do this via Wormhole.app as it is Airdrop, except it also works across the Internet when not in close proximity.
The problem here is mainly 1. Wormhole.app is just some website some entity runs, not a standard. We should have a good standard specifically for point-to-point sharing, and 2. It's not integrated into the OS. It's just as easy to pop open Safari and go to Wormhole.app as it is to go to the Share menu and select an Airdrop target, but one is vastly easier to discover than the other.
However, what you said was that you think it's "crazy" you can't just share a file between two devices. You in fact can, easily, without downloading random apps, in numerous ways, from Bluetooth to websites using WebRTC like this one. The Bluetooth one even has pretty good discoverability on Android as I would typically just use the share menu.
I will admit that it is unfortunate that there is no "obvious" solution but that's kind of how the ecosystem works outside of Apple. A lot of things will compete on solving a given problem before we actually get an answer that everyone agrees on. This has its pros and cons, and one of the definite cons is that not everyone is sure what to do. But it's weird to point at this and say "Look! You can't even send files between devices easily!" Yes I can. Lack of a single standard solution does not make it significantly harder, even when doing it between me and some random person that may use a different kind of device than I do.