Seems like you are making broad assumptions.
What makes you think I don't intend on buying a nexus tablet?
I've own 2 android tablets and both have horrible battery life. Less than half of that of my iPad.
Should people stop comparing products and just buy products blindly?
Likewise, and I completely agree - I buy the products that suit my needs at the time, and reviews are an important part of that process.
I love my Nexus 7 because of what it gives me for $199. But, if the battery life were significantly worse than it is, or the screen were blurry, or the CPU were underpowered, I'd not have weighed the cost as much and likely would not have bought it. The fact I didn't buy this iPad Mini (yet) doesn't mean I won't buy the next one.
It's ridiculous to take the stance that X product line is always better than Y product line, and then to cherry pick things to support that. In the case of tablets, there are clear advantages to a number of different lines, and it's up to the individual consumer to decide which product meets his or her needs at a given time.
BTW, I think the 7 is a steal. I'm not as enamored with the 10, because I'm not convinced saving $100 is worth not having the iOS experience in a tablet of that size. So, while I'll defend buying a 7 over a Mini, I'd equally defend (were I in the market) buying an iPad 4 over a Nexus 10. Blind loyalty is pointless.