How so?
Content Marketing companies and Content Farms use SEMRush to figure out which topics are covered by competition of their clients and which topics would attract visitors, and then pay pennies to a non-expert freelancer to produce a very shallow text with content probably copied from the same competitor, and littered with keywords recommended by SEMRush. Then, this text rises to the top of Google while non-SEO optimized quality content lingers in obscurity.
How Google doesn't go after those shady practices is beyond me. They're probably just afraid of killing a whole industry and having an antitrust target on their backs.
Google has gotten better at discerning between crap and quality content, but they still have a long way to go, and I'm unsure if it can be fully fixed the way search engines currently work.
Even their search results have gotten worse and worse.