How important is that backup QB pick really?

I’m in an 8 team PPR league. Just wondering if it would be better to draft a backup quarterback, or would it be better to use that spot for someone like Pollard or AJ Green? For reference, in all 5 of the mocks I’ve done Goff and Allen have still been available once the draft is over. My thoughts are that I’d rather have the bench spot used to give me more flexibility for sit/start decisions, rather than holding onto a quarterback I may not even use, especially when there’s viable qb streaming options left to handle the bye week. Thoughts?