Yellow Aster Butte is a reasonably accessible day hike that can be completed by just about anyone who's fit enough to hike. Yes, the last pitch to the butte is a bitch, but just about anyone can do it. The Enchantments, on the other hand, is a permit only area (for overnight trips), that is not easily completed in a day long thru-hike - which from the Stuart trailhead is 18 miles with 4500ft of elevation gain. Even experienced hikers struggle with the Aasgard Pass scramble. This list strikes me as not just best in terms of views and landscape, but also accessibility.
I totally agree the Enchantments are more spectacular, but they require some serious commitment and are not likely to be enjoyed by the vast majority casual hikers.
Fair enough, however the I would counter that the JMT can be sectioned, though not necessarily as day hikes. Other than the permit requirement it is way more accessible and less difficult than the Enchantments (don't get me wrong, they're both hard). I agree the JMT is the best hike in CA. I see how Yellow Aster could be considered the best hike in WA, the Enchantments is just different and special in its own unique way.
I totally agree the Enchantments are more spectacular, but they require some serious commitment and are not likely to be enjoyed by the vast majority casual hikers.