Why Resident Evil Movie Doesn’t Feature Familiar Characters

The new Resident Evil movie from Weapons and Barbarian director Zach Cregger does not feature characters from the games--why is that?
Cregger said in a new interview that it would be "inorganic" for his movie "try to shoehorn" legacy characters from Capcom's series into his film because it's a "self-contained story.""I have to put the story first and foremost," he said told Empire magazine, as reported by GamesRadar.
https://www.youtube.com/watch?v=N_KDtokTO1c
Cregger's Resident Evil movie tells