Untradeable packs and Buying Coins

If I buy $800 worth of fc points and open packs and I pack a 700k player that I don’t want or doesn’t fit in my team that I should be able to put it up for market. There shouldn’t be a thing called untradable packs becuase what am I going to do with this 700k player in my club? I feel like if I were able to trade these players and get kind of a money back by selling these players than their wouldn’t be a buying coins issue for EA.