Preloading why is it so uncommen

so for honor is haveing an open beta soon and is allowing you to predownload it 3 days before the beta even starts.

so this kind of got me thinking as to why preloading isn’t a thing more often or is it to do with always online drm because a single check if the game is owned would probably do or is it a worry about people opening the game before it is released

They think that by doing it this way they’ll diminish the risks of hackers uploading the files on torrent sites

i would think drm would still be present in preloaded builds but i guess deta miners are a thing i would be more worried with that than pirated copies if the drm is strong enough for a month or 2