Are Mountain Bike Marketing Categories Like Trail and Enduro Helpful, or Mostly Arbitrary?

Over time brands and consumers alike have latched onto designations like trail and enduro as a way to convey a bike's intentions. But shorthand descriptors leave important details unstated, and in some cases, can lead buyers astray.
Is this 150/140mm 29er with a 65.5° head angle a trail, all-mountain, or enduro bike? Does it even matter?

Mountain bikes come in all shapes and sizes, with models designed to roll over everything from the smoothest hardpack to the roughest, steepest rock lines. Over time brands and consumers alike have latched onto designations like trail and enduro as a way to convey a bike’s intentions. But shorthand descriptors leave important details unstated, and in some cases, can lead buyers astray.

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Are bike categories (like Trail, Enduro, etc.) helpful or are they confusing?

Bonus question for commenters: What is a better standardized way we could categorize or describe mountain bikes without resorting to a full geo and spec sheet?