I agree with you. However, what I have found is that if you install the additional prerequisites for those three programs along with what ArcaOS already installs, this covers most programs out there. Maybe add Aspell to the list also. So add approx. 10 more components and most software will work without further effort.
While that may be true, it does require more work to package all of it, and it all needs to be tested, to be sure that it doesn't break something else. If a user installs something, and it breaks something else, that is between the package supplier (usually BWW) and the user. Arca Naoe doesn't carry the responsibility to fix it (although history has shown that they will try). They are also trying to keep the distribution file size as small as possible. While the RPM packages are usually small, it does add up after a while.
Arca Noae has made the Arca Noae Package Manager (ANPM) available to help users do what is necessary. Those who package programs (ZIP, WarpIN, whatever else) should be making it easy to simply copy the list of requirements into the Quick Install entry field, in ANPM. The same list can be used with the YUM command line, if you feel you would rather do it that way. It usually takes longer to find the list of requirements, than it does to drop that into ANPM, and have them installed.