He's not being a barrister on his iPad though, he's just taking notes. And I question whether an iPad pro gives you anything over the cheaper options for that.
That's how a barrister does part of their work.
When I develop software I'm 'just writing a program'. But I'm not - I'm forming a mental model of what I want to do and working out how to express it.
You can make any job sound silly by reducing it to its constitutive actions.