A more accurate headline would be: "In many US metro areas, renting may allow more rapid accumulation of wealth than buying."

I've gone from renting to owning to renting and back to owning. Depending on what factors you consider to be important, then one may be better than the other or vice versa. For example, one of my periods of renting allowed me to live in a city where my work, my son's school, and nearly everything I did was within a 20 minute walking radius. I certainly didn't build as much wealth as owning, but owning wasn't an option in that area. Therefore renting was "better" by that measure.