They don't expect every detail, just the best assessment at the time. Of course it is wonderful to have these remarkable tools. Nevertheless, databases do not massage or analyze the data. They certainly do not replace human beings who need to make decisions by examining the data and applying their common sense, experience, analytical tools, and intuition. Comes in many flavors.
Competitive intelligence can mean many things to many people.
A salesperson considers it insight on how his or her company should bid against another firm in order to win a contract. A senior manager believes intelligence to be a long-term view on a marketplace and its rivals. The Internet or rumor chasing. The Net is primarily a communications vehicle, not a deliverer of intelligence. You can find hints at competitive strategy, but you will also uncover rumors disguised as fact, or speculation dressed up as reality.