Re: Seems simple to me
Let's continue the analogy.
If you burgle an ATM terminal of a Swiss bank in UK are you tried in UK or Switzerland?
You're still fitting in with what the OP put in that the offence - the digital break and enter - took place where the server resides, anything else such as misuse of systems along the way is just extras. In your analogy the ATM is in the UK and thus so is the crime.
A more interesting analogy might be you in the UK hacking the servers of Google/Facebook in a UK data centre that causes issues to propagate around the zones. Where then? UK? Each zone?
What it really comes down to is that the US are effectively the colonial power of the day and they make the rules by and large. A century or more ago the UK was likely doing the same thing shitting on people although not for internet crimes.