Because if so, they think we are dumb assholes.
Addendum by Jaded: This whole sausage making business is ridiculous. As if all philosophers do is sit around and do research. We also teach and sometimes make some really hard-and-critical-thinking sausages that go on to do some great things in the world in part because we've helped them become better at thinking. Sometimes we even educate scientists and they get better at thinking in virtue of thinking about non-sausage making arguments. And maybe their having thought about non-sausage making things for a while will help them go on to create sausages for whatever reason. I mean, I'm fairly new to the sausage making business, but I've probably helped to make some pretty good sausages in my time. I bet those who have been making sausages for years on end having made even more and better thinking sausages.
This is just to say, maybe we should expand what we think counts as making sausages. And, maybe we need to think more about the place of being intellectually curious in being well-rounded sausages. This isn't to license all philosophical projects, and maybe we should think harder about the types of projects we choose to pursue, but FUCK ALL THIS NOISE ABOUT PHILOSOPHERS NOT HAVING AN IMPACT ON REAL WORLD THINGS. As if students weren't things that existed in the real world. Also, sausage.