Future stars youth cup rewards/requirements

I just played all my matches in this tournament, and out of the maybe 20 games i played, only 3 times i played someone using U23 players. 
I lost 4 finals to someones weekend league team, with a few evos, while i was sttuggling with my U23 team in these finals. 

Why is it not a requirement to have under 23 years players in this tournament, when the rewards are for using under 23 years old players?

Some players answered when i asked them why they didnt use U23 players, and they asked me what they had to do…

so my question is, why do EA allow for players to use their normal teams, except a few high rated players. 
Im not competing on equal terms, against people who haven’t even read, or care about the rewards. Which is the ONLY reason i wasted many hours in that game mode. 
super frustrating, but i guess thats what EA wants, it’s for it’s players to be frustrated, becuase they spend more hours and money on this game. 

so thx a lot. 

Maybe give more tries than the 6 you guys gave. Also in this game mode and my players were acting more weird than usual, not similar to Champions and rivals