1. You're using VGChartz and their numbers are inaccurate.
2. Members from the XBox community use attach rate to discredit the impact of PS exclusives.
Here is BETTER data for PlayStation 4's top exclusive.
Killzone: Shadow Fall
This game sold 2.1 million units from November 2013-January 2014. This is very good considering how many PlayStation units were on the market at the time
The console will go on sale in Japan on February 22, the last country currently scheduled to handle the device.
gadgets.ndtv.com
Infamous: Second Son
It sold 1 million in 9 days.
Your source for the latest in video games, sci-fi, fantasy, tabletop games, anime, horror, books, and comics.
www.polygon.com
During this time, about 7-10 million units have been sold.
And Sony adds that it's sold more than 20.5 million PS4 games worldwide across retail and digital content.
time.com
Now we can look at the biggest games this generation in terms of units sold.
Uncharted 4 sold 16 million units
Naughty Dog celebrates 10th anniversary of Uncharted 2: Among Thieves. Daniel Ahmad, an analyst at Niko Partners, used this opportunity to discuss the sales of Uncharted 2: Among Thieves and Uncharted 4: A Thief’s End.
gameworldobserver.com
Spider-Man 13.2 milion.
gamingbolt.com
God of War 10 million, Last of Us 2 million (mostly on PS3), Horizon Zero Dawn 10+ million.
What you're doing is saying, "look at the top 10 games on the list, it's mostly multiplatform titles!"
Most of the games on that top 10 list are mostly the same games. There's Call of Duty and FIFA. Not too many games outside of those games, which means there's only a very small amount of games that sell better than the top PlayStation exclusives.
PlayStation games are selling really well according to actual sales data. Only a few games like Call of Duty, Grant Theft Auto, Red Dead Redemption are hitting 20+ on multiple platforms (Yes, there's a few other games, but not many. )