This is exactly correct. The guy I work for has friend who does sales at Oracle; as soon as he mentioned to his friend that he was starting a software company, the friend started telling him that Oracle was needed to make sure our data didn't get "corrupted" and started blaming random problems on not having Oracle; so the guy I work for started asking me if we needed to move to Oracle immediately and front the money for it. I was like, "hell no", we are a very small company, no need to pay a huge licensing fee just for a database that won't make a bit of difference to our customers... but he still sometimes floats the idea.
Wow, that guys is really good at hustling. Truth is very few people are technically well-grounded enough to audit the differences between two database solutions. And the solution(s) being closed source make it even harder. For the same reasons there exist literally no independent comparisons to different database solutions. So the choice will be highly fashionable, eg. based on how good you will look, rather then the qualities in the materials and handcraft.
