If WordAI can figure out how to spin content that's so ridiculously good (not trolling WordAI, they are great at what they do), why would you assume Google, with their billions of dollars, and 14 years of doing would not be able to figure out reading level, and quality of the content?
Sure, they can tell the difference between crap spun content and quality reading level. However...
14 years and billions of dollars means they're good at making money, not good at picking out and rankin the 'best' content for a search query.
Look at their search results. Amazon dominates product related searches when there's far better content out their. Google ranks shitty 2 minute YouTube videos at the top of page one when there's a ton of better and more deserving content out their. Thin spammy pages out rank far better content.
If they could identify the best quality pages of content their search results would be far better. They can't, that's why big brands dominate and they don't rank the absolute best page for each each search query.
A big brand page with image, add to cart button and a paragraph product description will out rank the highest quality 1,000+ word page of content all day.