No, you are just using the command line in the terminal to create the compressed/protected file. That's the process on a Mac, and it's supported natively by the system. Un-zipping the file should only need a double-click on the file. If password protected, then you will need to enter the password, and then the file is restored.
A third-party utility that does that may also give you a double-click-to-open file, or may need that software if the compression format and protection of the file is not natively supported on the Mac. There would be some that simply give a more useful interface than the Mac OS, but still supported by the Mac. If you come across a third-party utility that you prefer to use, that utility will likely be pretty clear that the recipient needs the same software to restore the file.
If so, then you could decide if it is easy to use, and you could simply send the app to the recipient, along with the compressed files. Adds another level to sending files back and forth, but that would be up to you, in that case.