LOL! Are you comparing RETAIL sales?
Fallout 4 sold 1.2M units on steam day 1. It shipped 12M units to retailers day 1. More than half of retail sales were playstation.
Shipped =/= sold to customers
First week it sold over 3M copies on playstation (sold to customers). The other 2 or so million were sold on Xbox or PC.
So keeping with the same ratio, shipped units would be around 7M for PlayStation, and the rest for the other 2 platforms.
Now starfiled will lose about half its audience and will be "free" day 1 on PC and Xbox. Are you that fucking stupid that you can't realise it will not sell that much?