Because the point of these updates is to be rolled out quickly and globally. It wasn't a system/driver update, but a data file update: think antivirus signature file. (Yes, I know it can get complicated, and that AV signatures can be dynamic... not the point here.)
Why those data updates skipped validity testing at the source is another question, and one that CrowdStrike better be prepared to answer; but the tempo of redistribution can't be changed.