I am 100% certain you have a passion that others would question the same way. Maybe it's food, cars, shoes, clothes, etc.
A passion that makes you happy, something you see value in. And that's awesome. Even better when you find other fellow geeks to get excited about it with.
Let's not judge each other's passions on RFD, but also let's not flame the guy for not sharing ours (save that sh*t for reddit lol)
If you're not being facetious and actually are curious to learn more, well then you've come to the right thread!
Here is a decent general overview of blade vs burr grinders (educational part concludes at the 2min mark):
Warning: Watching this video may be hazardous to your wallet. Side effects may include many lost hours diving into forums on reddit/home-barista, and/or watching James Hoffmann videos.
I hope it helps you take a step towards better coffee. But if not, well that's ok too - at least you had an open-mind about it and made an informed decision.