B C Z
It doesn't say "can" though. Is this just a misprint? None of the fears give you a choice, it lists specific advantages and disadvantages.
p24-p25 in the rulebook.
Gwf feat stats you can only play one glory a round for 2 martial damage.
GWF is "continuous", meaning it's always in effect. That fighting style forces you to play maximum of one GLORY per turn, and then each GLORY does BLACK/BLACK.
That's not the feature you originally asked about, which was Two Weapon Fighting, which is not continuous, and thus has to be activated.
And as for holding cards, anyone can hold the amount of cards to catch up to that. They just have a stronger early game. Half orc holds 4 cards its the same cycle. Just a huge advantage.
If a Half Orc holds 4 cards, they won't be drawing any cards. You only draw if you have three or fewer cards.