Trump winning the Rust Belt in 2016 wasn't a fluke, but that putting him in the White House & rendering MAGA anything other than a historical footnote related to the 2016 election was certainly an unfortunate quirk of our convoluted electoral system that exists for no other election even here, let alone in any other country in the world. Most Americans didn't want him, just like how most Americans never wanted a Republican Senate majority or a 6-3 conservative SCOTUS majority.
You could argue Trump's win in Michigan was a fluke but his wins in Wisconsin and Pennsylvania were not.