Global Bicycle Cities Index 2019

I saw this article published which ranks the top 90 cities worldwide based on their overall cycling conditions.  It was interesting to note that Seattle is ranked 49th worldwide, but 3rd within the US.  Also interesting that the top 3 US cities are west coast, hilly, and not known for great weather, all of which must handicap them somewhat as weather is factored into the rankings and all would seem to discourage cycling.  The top US city, San Francisco is also only ranked 39th worldwide.  Another point of note is that Los Angeles is the only US city to make the grade that is known for good weather.  No Phoenix, Tampa, Miami, Atlanta, etc.  Seems that one could argue that cycling conditions are largely cultural vs environmental based on these results.