Assassins creed odyssey was apparently 44-50GB at launch. That’s 3 hours @ 45 megabits/second.
This is not an uncommon internet download speed even today (let alone 5 years ago when it launched) according to the steam download stats (it varies by country, check australia for example, US is a little over 100 average):
https://store.steampowered.com/stats/content/
Even at 100Mb, 45GB is 1 hour. Witcher 3 looks to be about 30GB but Cyberpunk is apparently 70-100GB.
If you include download time, even that doesn't hold up to your claim.