Are sponsorship logos on uniforms why soccer has not caught on in the U.S.?

Outside the U.S., professional football (soccer) team uniforms have a tiny little crest for the team's logo, paired with a nice big corporate ad across the front of the jersey. An example is "Fly Emirates" on I don't know what team - this is precisely my point - it brands anything but the team and there is no team identity! American (MLS) teams are beginning to go the same way (e.g. Herbalife on L.A. Galaxy). As an American I'll be the first to admit we're a very commercialized society, but in any popular American sports league (MLB, NFL, NBA, NHL - NASCAR is the exception), sponsor ads are restricted to stadium walls and TV/Radio plugs. You NEVER see them blazing across the front of a uniform. It's taboo! The game and team identity are sacred entities not to be defiled. Remember the backlash when they tried to advertise the Spiderman movie on second base in a baseball game? Can you imagine "American Airlines" instead of "Yankees" when they take the field? Discuss.