User agents aren't "technical gotchas", they're a fundamental concept of the internet we enjoy today. Browsers are merely one type of user agent.
If you make content available via HTTP, then obviously any HTTP client will be able to access it. It doesn't matter that they "meant" for the content to be accessed through browsers.
If they had a proprietary client that wasn't a browser, they wouldn't be complaining at all. So why does it matter? It's about control. It's the fact that user agents act in our behalf in order to do what we want and protect our interests. They want to force us to use something that acts on their behalf, does what they want and protects their interests.
This isn't about "human judges". Those are all paid for. Industry lobbyists literally create the laws that they blindly enforce.
No, this is about a stealthy war that's being fought for the control of our computers. There will never be peace between us. Either the entire copyright industry will be destroyed or we will lose the computing freedom we all currently enjoy and the entire concept of "hacking" will be a footnote of history.