UEFA is Europe basically. So like the nexus of modern football
7/10 of the currently top ranked national teams are UEFA members.
UEFA's reach affects the remaining 3/10 and beyond. Nearly the same fraction of world cup players (68%) earn their livelihoods playing for European league teams- including many players representing non-European countries at the World Cup.
An even funnier fact is that players who play for clubs in Europe (UEFA) won't be allowed to represent their countries.
FIFA made ludicrous amounts of money as a non profit running the last World Cup and want to transition to a for profit corporation to make even more.
UEFA representing the European nations with the most competitive teams and many of the biggest stars, just told them good luck running a World Cup without us.