Random scheme chemistry’s.

Why does EA make cards of players from the same team from the same roster and give them different scheme chemistry’s? This is super annoying and makes zero sense for example, Cam Ward and Xavier Restrepo both have Spread scheme chemistry’s, the new Mark Fletcher card has Spread Option, why does this make any sense, they are on the same team from and same roster, why not give them all the same chem, this is done with several others as well, if they are from a different era for the same team that makes sense but when they are in the same roster I just don’t understand why this would be.