It got fixed pretty much instantly.
It's only affected a very small number of pirates.
So, unfortunately, there's not some mass of illegal downloaders being thwarted by pixelation.
However, as with all things, there will always be issues with a pirated version over a legitimate copy, so, if you're looking to enjoy the game, buy it.
Though, if you're looking to get enjoyment from The Sims 4, good luck.
It's only affected a very small number of pirates.
So, unfortunately, there's not some mass of illegal downloaders being thwarted by pixelation.
However, as with all things, there will always be issues with a pirated version over a legitimate copy, so, if you're looking to enjoy the game, buy it.
Though, if you're looking to get enjoyment from The Sims 4, good luck.