Yeah, know what you mean about the trigger. But it is really semi-open. Just like any other pocket holster, but more so with this one "DON'T PUT ANYTHING ELSE IN THE POCKET"

When you draw it, you put your middle finger in the bottom hole and wrap the pinkie and ring fingers around the grip, with trigger finger extended straight until coming up on target.
Sticking your middle finger in that hole is feels un-natural.
Seems a little awkward at first, but like anything else, with a little practice, muscle memory will set in.