My female dog was my only dog at the time I got her.
Exception to what rule? That every dog bites if it's taken from it's mother earlier than 8 weeks old? That's ridiculous.

Generalizing and using scare tactics is just not a good way to educate in my opinion. Have YOU had dogs that were taken younger than 8 weeks that turned out to bite? Where is this RULE you speak of written in stone?
My parents have a dog that we got from the shelter that was 8 weeks old when we got her......and she had been at the shelter for all of a couple weeks at least.....and she was a confiscation case because she was left outside by herself, no food, no water, no shelter, no interaction....and she is now 15.5 years old and has never even thought about biting a soul.....
And I could go on and on about the NUMEROUS dogs that I've known that were taken from the mother dog around 6 weeks old and have never had any problems so this "rule" annoys me.