My finances are my problem. All a landlord needs to know is that I am willing to pay what they are asking. It is my problem to actually pay the money. There are lifestyles in which you don't have the ability to show someone a pay stub, and can still pay rent on time every month.
That is why things like credit checks exist. It's a way to verify that a person has kept their finances in order and are responsible enough to pay their bills on time.
You know what place doesn't? A place where your landlord requests your salary documentation.
If that doesn't happen where you live, then this warning is meaningless to you. If it does, it's an appropriate thing to warn people about given the enthusiasm surrounding this post.
Can't afford to buy, can't meet exaggerated rent criteria,..., profit? I did see a nice rock i might be able to live under, as long as the HOA fees aren't too bad.