I'm always stunned that despite paying full price for all of these (nearly 20 years ago), loading them (a month-long project annually), and hosting them (bandwidth for pdf documents is expensive), someone always finds something to whine about.
JTKC, a couple thoughts: When you bought that CD-ROM, you bought a bootleg pirated copy of a copy of a copy. Some dude in China doesn't give a damn that it contains inaccuracies, as long as you pay up. They used to be quite common, and some were amazingly incomplete.
You're 100% correct about common sense and research. Just remember, even the people who assemble the manuals are prone to errors, and holding them to a higher standard than you and I seems somewhat disingenuous.