Well actually the " guarantee" is that an average 87% of women will live to 80 and 80% of men will live to 80 and therefore would receive more money by waiting until age 70 for CPP.
The column is by an actuary remember.

The actuary is saying that the vast majority
will live past the financial breakeven point for taking CPP at 65.
That is that taking late CPP at 70 it will benefit most people.
In addition, the CPPIB will do the worrying about the rate of returns for us.
Awesome.
It's a no brainer to take it at 70 unless you are retiring before you can really afford to 
and have to take the much lower early CPP  or if you have a bad diagnosis and know you will likely die before breakeven point for early CPP which I believe is about 77 or 78 years old.
The financial facts and probabilities  are mathematically true as the article says. 
You can't make them untrue by your opinion.  You can wish it weren't so that's all.