We have to keep in mind that this is a generalisation. If you have a technical mind and experience, you'll probably know how all the pieces fit together instinctively. Where the certification provides an advantage is in some situations you are talking to a person with experience with that product, they can give you some insights they have earned through experience, and that increases the value of a certificate for a person who is beginning to learn about information systems.
At the end of the day, they're information systems. With marketing you can tip the intangible assets side of the balance sheet and look like an 'enterprise', but that then leads to the argument of morals and morality, for which Harvard made the decision 20+ years ago that morals arent worth teaching.
Which is what I would rather debate. If closed minded thinking rules the business world, then why be a slave and give up? Whenever I go for job interviews I make a point to explain the difference between a over-night certified person vs a technically minded person who loves IT. Which one would you hire if you were a slave trader... I mean, 21st century 'entrepenure'?
I think this is a topic of those obsessed with their own divine right to everybody elses money understand that free people still exist, and there are more 'free' people in IT than their other pet investments. Thusly they want IT to be simple - be a single skilled slave, like those in California who are 'too old' to code.