Acknowledging that doing both takes time and resources constitutes a free pass? This is a strawman argument, which disregards not only the rest of my post but every other post in the thread making a similar set of points. Both would be great. Obviously, both takes more time and resources.
Of course they take time and resources. That's stating the obvious. I assumed your point was that Bungie didn't actually have the time or resources to do a raid, which I question because they've reused old assets almost exclusively so far and have an enormous development team. This isn't a small outfit operating out of a garage. Destiny has sold over 10m copies so far. What else is Bungie working on, then? And Bungie themselves didn't say that they didn't have the time or resources, so what are you basing that assertion on?
You talk about the game having many activity types, but most of those activity types use the exact same assets and don't really include any additional story. I don't think they are spreading themselves too thinly in this respect. I would agree if each activity type were standalone game types that featured unique content, but they aren't.