Pretty much what I was thinking the whole time I read it.  I'm also 100% sure that I didn't lose over 55 pounds due to my environment.  I ate less and moved more.  My environment didn't change.  I changed.  With willpower.  I set goals and I met them.  Then I set more goals and met those.  Basically it's what any functioning adult should be able to do.  Articles like this make me rage.  They act like people have zero agency over their own lives.