I think there's a big difference. Not about pay, but about opportunity.
Professional and national soccer teams all over the world hunt for kids with talent starting in elementary school. And they hire them to play at youth academies. So many kids are given the opportunity to develop their skills and rise to the top.
For potential NFL qb's, the path is much much narrower. There's only 32 starting jobs in the world. And at any given time, only the top 10-15 players at the qb position have job security. Where as they are over 20 professional soccer leagues, each with 20 teams, and then multiple minor leagues below them which can win their way into the top flight (MLS excluded.)
All of this just to say that Josh Allen took the road less traveled. His story truly is one in a million... Or is it one in a billion?