Repackers argue that they provide a preservation service. When Steam or the Epic Games Store delists a title (like The Crew or Transformers: Fall of Cybertron ), repacks are often the only way to play those games.
The biggest issue with aggressive compression is asset degradation. To get that file size down, the repacker has likely downgraded textures, audio quality, or cutscenes. You aren't playing the "Definitive Edition"; you are often playing a washed-out version of the game. Furthermore, these repacks are prone to crashing because critical files might have been trimmed too aggressively to fit the meme quota. diddy repacks