That's pretty darn funny, but it also contains a very profound truth: society stigmatizes those who think freely, and philosophy is the gateway of such freedom. The reason why it's scoffed at, though, isn't often given.
And I think the answer is simple enough. Free thinking questions culture, including its beliefs and values. Undermining culture means undermining the group. That's an evolutionary disadvantage; put another way, philosophy is a way to individuality, which transcends the evolution-stamped urge to the in-group.
There's a real spoiling element to questioning culture. You realize that most people follow the dance moves without really intrinsically valuing them. I have a brilliant client who is questioning the culture of femininity, if you will. She says she has no desire to dress in ways that other women find "female", and often needs the guidance of others to look "appropriate". She has looked beyond culture and analyzed it to its core. What happens when you do this, whether through reasoning or a simple lack of experience (notice how "strange" other cultures appear to us), is you see the behaviors that have no inherent meaning for many of their contributors. It's one thing to dress business-style because you really like how you look; quite another to dress this way because "it's the right thing to do."
So philosophy is insatiable. It works from the vantage point of what's good for the individual in terms of finding what's really true. The philosopher is by definition the outlier, even when he's in the presence of other philosophers.
And groups don't like outliers.
