People dismiss so much stuff with "I could have done that...". Well, you didn't, and they did. So there.
(In this case, the task is probably more annoying than you think. There's a lot of little details involved in getting the alignment correct, getting the fonts wrapped, generating the PDF, etc.)
I guess
-some upvote because they like the idea (it could be monetizable via paid printing services, it lends itself to social - sharing of decks etc),
- some found it immediately useful
- some just found it refreshing that someone created something small to scratch an itch instead of going viral on a new blockchain.
Therefore, I upvote.
https://news.ycombinator.com/newsguidelines.html
https://news.ycombinator.com/showhn.html
Edit: since you've repeatedly posted uncivil and unsubstantive comments and ignored multiple requests to stop, I've banned this account. If you don't want to be banned, you're welcome to email hn@ycombinator.com and give us reason to believe that you'll follow the rules in the future.