Why can’t I use ultimate teams in season mode?

I think you guys should bring back Ultimate team and auction back it was a way for people that didn’t pay to play on the game to have a chance to compete in arena and just for people to buy some players to create their dream team. Ultimate team was just a easy and quick way for people to play in seasons for entertainment. 

a whole separate idea if you guys are just look for more things to add into madden is draft as in when you play season with your regular season team you’ll be able to draft players at the beginning of the season with 1st, 2nd, and 3rd round picks by trading. There would also be a Hall of Fame tabs since you would be able to play with that team that you played with “last season” to see who is HoF worthy. Also there should stats at the end like how many rings they have and who is the offensive/defensive player of there year and MVP and also maybe even rookie when you first draft them at the beginning of the season. Add a tab for records for example longest throw, most TD in a game, most yards thrown, things like that to add interest into new players and keep old players busy to grind out the game. This is a whole seperate option that I was thinking of to making the season more interesting but for sure add back the old season and auction.