1) it will take time to liquidate your assets at FMV. Life insurance gives your family time to not fire sale
2) You presume your wife will want to work again, Not necessarily the case. It will be a blow should you unexpectedly pass. Will give her time to adjust without having to hastily return to the workforce
3) Its cheap. Your age and health, term policy for $1 Million probably not that expensive
4) the Unknown. what if the real estate market tanks and your real property assets are no longer as valuable as they are today. What if the time to sell increases to 6-8 months due to poor economic conditions. Life insurance provides the safety net.
Really seems dumb if you have the means to not get this safety net and potentially a bit selfish on your part.