I don't understand WTF are you complaining about!
This is a great piece of software with lots of features. The integrated archive option in Panther is still a really BASIC feature. With Stuffit Deluxe you can look inside archives with a simple ctrl-click, you can compress in whatever format (sit,zip,tar,gz,bz,tgz...) you need and you can expand/compress things simply by deleting/adding the relative extension (".zip", ".sit", ...) at the end of the archive/file's name. Thanks Aladdin!