As well as the lack of clear documentation, I hate the fad of naming apps for things that are really hard to search about. Doubtless someone will go one further and invent a coding language called ‘variable’.
Shortcuts seems like style over substance. The UI is not the issue, but the range of functions available. iOS != macOs in that regard. ISTM Automator is still a better starting point. Indeed you can still use AppleScript but Automator sorts the rest with the exception of being able to apply a shortcut. It sort of makes sense to use the System Preferences, but it sucks that Automator doesn’t let you open that in-app and let you set the shortcut without losing context/focus.
Still, MB’s request was a good reminder to look at both these tools. I guess it took me c.10 min to dust off Automator, make a solution, test, and describe it. Were it just for me, the last step is not needed. You were absolutely right to add a shortcut as in this instance it is the force multiply (if unintuitive to some) as it reduces the per-instance tasks to:
- select text
- call and run [thing] via shortcut
- select target
- paste extracted email to target