Why use DAC w/ server equipped w/ one already?

Hello all. I'm still in preadolescent stage as it comes to hi-end hifi and am building a system gradually via the aftermarket. I'll try to be succinct. Not altogether optimistic of pulling it off though lol.

Thus far, I've purchased 2 items: Anthem Integrated 225 amp and Usher CP-6381 speakers. I've listened to neither thus far - the most maddening aspect of starting from scratch via the aftermarket. Read reviews endlessly; pare down to selections that give all indication of being can't-miss and still fit within the budget; wait patiently for them to appear on Agon or Amart.

The pieces purchased to date should yield a fairly clear indication of the budget in play.

After spending many hours learning the game, it became clear that a music server is the way to go. I'd all but decided, for good or ill, to purchase a spinner first so I could get started listening, plus I just want one (probably because I'm over 50). It would require the capacity to become a DAC at a later date. To that end, Oppo BDP-105 and Cambridge 752BD jump to head of the class because of the inputs.

So today I look through music servers to build knowledge for the future and see this Olive 04 server with a CD slot. Comes equipped with a DAC. Well holy hell, that' a game changer lol. Just get one of those and no need for a separate spinner. I start reading reviews and one string was laden with posts about hooking it up to a DAC.

So there's the question: why?? Why not just use the analog outs and hook directly to the amp? Is that the mindset from a higher-end perspective or am I missing a step?

Thanks for reading and ignoring that "succinct" folly to open the post.