Nothing wrong with protecting yourself financially and I wouldn't worry about the balance in that regard either. Yes it is important in some cases, but like Azzork said you do whats best for you and the kids and take what you need. You never want to just cause an argument for no reason, but don't let it go at the expense of protecting yourself.
An example would be having a huge blow up fight over who gets the nice spatula from the kitchen. Avoidable and pointless, it can be replaced easily. Now the other side is caving where she wants 80% of the finances and leaves you with 20%, you stand your ground on that one.
But if it ends up being 52%/48%, who really cares.
Accept what is, let go of what was, and have faith in what will be
