How many people here can predict that they won't have need for Life Insurance in 10, 15, or 20 years? Friend on mine just posted on FB that at 51 she's the oldest mom of her 4 year old daughter pre-school. No chance of grandkids living with you ? No chance of having kids (or more) later in life. Worst thing that happens is that it grows to far beyond what you put into it, while providing life insurance.
The idea that Brad put forward does essentially the same thing with fewer fees. It assumes you will self-insure with the investment after the term policy expires. It is also essentially what whole life companies do ... namely, take a chunk of your premium to cover a death policy and invest the rest. Then, once they've made their money, they return a piece of that to you in inflated dollars.
Remember, they are making good money on the deal ... and can afford to pay big commissions on the whole life policies too. You can't do the death insurance portion on your own, but you can certainly do the long-term investment side.
Hell, if it were car insurance where you get all your money back if you don't have an accident, people would jump all over it.
But what if it cost three or four times as much as comparable coverage and you only got it back if you stick with the company for decades?