Maybe yes, maybe no.
We know that life has started out in an anaerobic environment with water present. Everything else is up for grabs. So if you're looking for life-as-we-know-it, it makes sense to go with the conditions we already know works.
TF Headline is, of course, hyperbolic. Alien life doesn't necessarily require conditions similar to earth. But that's were the money is. If you have limit the types of planet systems you will spend the time and money to look carefully at, you just might go with what has worked.