It should have standard print sizes as an option as well as custom entry but locking proportion.
I never crop to generic 16x9. I crop to 4x6 or 5x7 or 8x10 to order prints. Or I crop to 1920x1200 for wallpaper, etc...
These would be different choices in different parts of the world of course.
These four presets just seem too small a list and too generic.