The problem with this argument is that the B/X (and later RC) version was so much better than AD&D!
Seriously, there was a demand for both a "rules lite" and a "rules heavy" version of the game. The "rules lite" version could act as a gateway/stepping-stone for the "rules heavy" version, or it could suffice for those players who were happy with it.
The problem with DnD right now is that there is no "rules lite" version. And I don't mean a "rule lite" intro package (like that stupid "The Adventure Begins Here" boxed set), but a distinct separate version of the game for those DMs (and players) who don't care to read two long books in order to grasp all the variables that might come into play in their games (and that might affect their campaign and adventure design, etc.).
Once you have mastered all the details of the 3.x rules they seem very intuitive and simple, but achieving mastery can be tedious and time-consuming (and even with mastery there are always spells and feats that you fail to take into account when designing adventures, etc.).
I am not criticizing 3.x DnD here -- I am running a fun campaign right now, with many variants from UA, house rules, etc. -- but merely pointing out the need for an equivalent to the old B/X rules. During the 80's not everyone had the time or inclination to move onto ADnD -- and I am sure that the lack of a B/X equivalent today has driven many potential players away from the hobby.