Then you picked the wrong example in Post #106 with Bugzilla and MySQL, since the average user will not be installing those particular apps.
With the introduction of that scenario, people assumed you picked a real-world experience you had recently gone through, and attempted to explain that "RPM hell" had been solved with yum, apt, YaST, and a variety of other tools. Those are easily installled on any distro regardless of whether they originally shipped with that distro.
For instance, apt ships with Debian, but I have it running on my Fedora box alongside yum, to take advantage of the different repositories. This particular setup will not be done by the average user, but the average user probably isn't as interested in the range of apps I am interested in.