Seems previous World Cup in Qatar has good qualities stadium than United State, Canada and Mexico, I can't imagine what FIFA decision or reason choosing North America because there are football is not popular spot exactly in United State they basket ball are most favorite sport. Talking about Major League Soccer seems not excited yet and FIFA have responsibility later if World Cup matches not excited and stadium full like in Qatar. Have two years later for the host preparing good stadium and seems they have enough team for rebuilding with stadium and infrastructure.
In the previous world cup, Qatar didn't have good-quality stadiums, and that's why they had to spend lots of money to build sports facilities, but in America and Canada they won't have this problem and the only thing the next world cup host should do is to repair the existing stadiums also I'm sure we are going to see stadiums with higher quality.