I think letting America and two other countries host the world can be very good but the thing about America is they don't have many football fans and compared to many other countries in the world America is a country to place football in first priority maybe that's the reason to say they could find a better host but the fact is America is country where they can provide best sports facilities and hotels to host the world cup.
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(However, that's for 2014, not today)
Which is why FIFA wants to hold the world cup at the US, they want to increase the interest on soccer as they know that if they can do it then the market that will open to them will be huge, now this will be hard as they are competing against the four major sports on the US, but if soccer makes the list as the fifth or they can replace one of them then that would be a big win for FIFA, what surprises me about that chart is that roughly half the people at England have no interest at soccer, as this is the sport they created and it is the most popular sport around the world.