That is some sorry, misinformed and dangerous advise.
I would like to see your breakdown:
on how timing belts age.
how the different brands compare
how long they are in warehouses before sold.
who is the original manufacture of the replacement belt.
Actual facts, not wives tales.
People change the belts, not because they need to, but because they can. No one knows the life of the belt, they also don't know the life of the new belt.
Just because you buy something new and it is in a package, does not mean it is better. It does mean it's untested though.
Most parts these days are not sold as high quality, they are sold cheap as possible with warranty or service contracts if the buyer is willing to pay for it.
The most common reason I have seen that belts are changed is that they are old and there is no way to test the rest of life.
If this is the case, how do you tell if the new belt is any good/defective to begin with????
And finally, the timing belt is not going to kill you, its the car driver with the cell phone.