I don't understand why anyone buys Oracle. Every Oracle product I used over the last 15 years has been awful.
It's legacy lock in. You can't just switch stuff. it's incredibly hard to move logic out of store procedures from on DB to another. Its the same reason why the US government runs on Cobol. People don't think about the strategic implication of the tech they choose and how it may come back to limit them in the future.
And let's be honest, a lot of folks in IT aren't exactly top performers and don't seem to care all that much. It's really the developers you find on forums like this who are genuinely passionate. You're not likely to bump into the people actually buying those big Oracle or IBM systems around here though :)