It is to set your expectations. You can't expect to find a woman who has the same interests as you unless you have relatively girly interests. The further you are from girly interests the more you have to lower your expectations.
For example, most relatively nerdy guys will stay single forever if he looks for a woman that likes similar things. If you aren't happy with staying single forever you should therefore realize that you need to compromise and accept that you will get a girly woman rather than the woman of your dreams.
I don’t agree with this at all. Almost every couple I know has some shared interest and almost no couple I know shares all of the same interests as their partner.
In other words, if you like technology, sports and philosophy, it’s not that hard to find a partner of either sex that will share at least one of those interests. Or if your interests are cooking, concerts and wine tasting, same thing.
The compromise needs to come from needing your partner to share every interest. But we do the same things with friends of our same gender. They don’t need to share every interest we have, just one.
And I don’t agree that you will be lonely forever if you want a partner that shares a stereotypically gendered interest. I know men that have fallen in love with women over baseball and others over art and others over fantasy fiction and others over yoga.
Sure, maybe your odds are reduced but they’re a far cray from “staying single forever”.
The only place I can think of is that it might tell you the probability of finding what you're looking for when dating.