Ps4 has significantly more exclusives, more higher-rated exclusives, more award-winning exclusives, & more exclusives that are more popular.
Relative scales of the consoles reflect that.
If you are on a platform with weaker sales, you will be an afterthought to developers & it could mean weaker games, less special content, or just not released on the platform, like Stadia or Windows phones. Even if you do not care about "console war" sales of platform matters. Ideally, the platforms are competitive & we do not end up with a monopoly, & at the same time, you do not want your platform of choice to be well behind in sales.
I don't think there is such tilted complete domination as the PS4/XBOX one on level starting ground. From hardware, from quality from quantity, PS4 beat Xbox one so bad its sad.