Everyone has an interesting life if they really want to sell it. But how is it relevant to the book? I'm not an agent, but I don't think they want to know your life's history unless it's relevant to what you're trying to sell.
Besides, whether you're an interesting person or you're not "regular" has no bearing on the work itself. Sure, if they want you on the cover of People's Magazine that may be a fun thing to read about. But otherwise, it's still about the work. What does your bio add to the proposal?
The fact that Woodsie's childhood and foster care experiences are relevant to the book makes it a good information to include. No agent is going to say, "she seems like a wonderful, intriguing person" unless it makes her want to read the book -- so relevancy is important here. The fact is, there's so much about a person we can know... and you need to pick the right information. My history as an immigrant is irrelevant if I'm trying to sell an epic dragon fantasy -- unless, for some reason, I can find a connection there.
I think listing schools and cats is silly anyway. Who cares where you go to school unless, again, it's relevant? An MFA degree might be good to have, or if you have a law degree because you write legal thrillers. Other than that, again, agents don't have the time to "get to know you" or "how many cats you have" or if you graduate high school or not. They want to see if you have what it takes to write the book you're selling.