I think we should have insurance because it could save money, and even lives. The money part is because if we don't have insurance we might have to pay for everything, and a lot. Then if something gets broken we have to pay ourselves. The lives bit is because if we pay we might save money and prevent famine.
I think it depends on the person, lifestyle, and other factors. Insurance is a good thing but not when your taxes go to it, for example, Obamacare. Private insurance plans and people who earned the money to pay for their insurance has some of that revoked due to Obamacare. Now that seems pretty unfair. Obamacare did give benifits to people that didn't have them before so it really depends. If the government found a better way of doing this it would have been better for many.
Insurance inflates the price of the goods insured. Instead when expense causes too much hardship the government should step in to help. Otherwise pay with your own money and not insurance. Even for healthcare. If you're not dirt poor pay for your own contraception and cold medicine. If it's something really expensive and you can't afford it without going bankrupt, without sacrificing your own or your child's college education, or especially if you can't afford it period then the government should bail you out so its affordable.