I think quoting a rule of thumb figure for what you "should" be paying for insurances is inappropriate. In any event, the stated 10 - 15% seems wildly high. So someone earning, say, €50,000, raising a family, paying a mortgage and trying to save for short, medium and long-term needs could afford to spend €5,000 - €7,500 per year on insurances? I'd love to meet them.
Far better, in my opinion, is to identify how much cover you actually need, by reference to your income and outgoings. Then get the most competitive policy to meet your needs. Working off cost first is the tail wagging the dog.