trim all the transparent pixels (constrain to image)

why is it still so clunky to crop an image to remove all transparent pixels in ps, when lightroom has a checkbox.   The crop too snaps to the image bounds which is fine most of the time, but when you have a 3 or 4 pixels of transparency - and not in a perfect rectangle (so you cant use the trim or crop command), its hopeless.

I just cludged an action to do it, but i'm guessing it could be done in about 10 lines of code as a script