I agree with you, and I don't see her parents as greedy leeches. I've seen a few documentaries on Britney over the years, and from what I gathered, BRITNEY wanted a career in showbiz. Former teachers, old friends, family members - they all attested to the fact that Britney was very driven. Yes, Lynne facilitated it but I don't think she pushed an unwilling child into it. When Britney was around 10 or 12, she was in some Broadway or off-Broadway play for several weeks, and when she got tired of it she told her mom that she wanted to go home to Louisiana and that's exactly what they did. Lynne isn't some famewhore like Joe Simpson or Dina Lohan. She is in the spotlight of course, but not for herself. Lynne lives in a very nice little mini-mansion but I'm sure Britney wanted something a lot nicer than the old, small family home to come home to when she came to Louisiana.
The Spears family is not perfect and I think Jamie and Lynne would love to have had the benefit of hindsight when they were raising their kids. I just don't see them as evil, selfish, greedy monsters the way some people do.