You payed for the game and what's included. The content updates are FREE. You did not pay for them, they were just added. Meaning you do not lose or gain anything in the end if you did not play (and there is always a new update out, one leaves another takes it's place). You don't have time to play in 2 weeks? That's a personal issue, it's plenty of time. Besides gated achievements (which are very few) you can complete everything in a day if you are dedicated.
You not playing the game is not Anet fucking problem.