Guild Wars 2

Can anyone explain me why with sword as main, the choice of traits is different than dagger as main… sometimes I ve seen that S/D build is 2/0/6/0/6 but D/D or D/P is 0/6/6/2/0 .
Which change?
Thanks for your attention!

Sword and dagger builds are played differently and each benefits more from certain traits. However, not everyone runs around with shortbow as secondary so it’s a good idea to try different traits for whatever weapon sets you pick.