To add to the good information already provided, there are significant and complex tax implications associated with estates. If tax planning is not properly considered, much of your estate (possibly including life insurance and other benefits) could end up being used to pay estate taxes instead of being available for your survivors.
The cost to have the appropriate documents to address your estate planning needs prepared by an attorney is usually quite reasonable. I encourage you to get a couple of references and check on the cost.
It doesn't matter what you think, just that you do.