It is good to see that this thread has come to the decision to "agree to disagree" which IS a solution. However I have a better.
The only risk that we face is outliving our money. After the effect of taxes and inflation, a dollar today is worth much less tomorrow. Just look at the price of stamps in your own lifetime.
So, considering the above, if you want your investments to outpace taxes and inflation, you must be an owner, not a loaner. You need to invest in equities, not bonds.
IF you do this, you will become wealthy. There are many ways to do this, and managed OR index funds will work. BUT you have to stick to a plan, and not COMPARE yours with your neighbors. Both Buffet and Bogle are very wealth individuals, but they have not invested the same way. What they have done is stick to a plan.
The index vs. managed fund debate will never end. But over the long term both have historically outpaced inflation and taxes, which is what you both are looking for right?