The new 8-hour, 3-part docuseries "The Beatles: Get Back," branded as a Disney+ Original and hailing from blockbuster filmmaker Peter Jackson, raises two unavoidable and unfortunately unanswerable questions. First, why is this 8 hours long? And second, why is this on Disney+? The latter question, no less a head-scratcher than the first, at least does not pose as a commentary on the content of "The Beatles: Get Back." But for a streaming service that is awfully shy about presenting some of its own kid-friendly animated content from the 1930s and 1940s for fear of being tarnished as too problematic, it's impressive that Disney+ is also willing to air uncut a documentary where musicians let the f-word fly calmly. The larger problem looming over "The Beatles: Get Back" is why this mammoth project needs to be quite so mammoth. Jackson, as many people both on social media and in the real world will remind you, is no stranger to struggling to end his proje...