Simply because there was nothing else to play at that time. I am already playing other games. PS4 had a small library of games, when Destiny came out. It was to play Warframe or Infamous Second Sun or Killzone 4. Now obviously there are lots more games. I choose to help my clan do the raid, I don't actually play Destiny anymore. When my clan asks for help in Hardmode Crota, I come in to help them. All that could have been done prior to release of the initial game. All we got was beta with 2 more planets.