Why can't I click this list element with JXA?

Hello all,

I'm trying to interact with the default Mail app using Javascript for Automation (JXA). I want to click on the first email in the list so that it opens in its own window. but clicking does nothing.


My code:

var se = Application("System Events");
var mail = se.applicationProcesses.byName("Mail");


If I remove the click() and use .select() it will select the email from the menu, but clicking on the email list item itself just returns null in the repl. I tried clicking on each of the inner uiElements but this doesn't work either.