The smaller games don't cost as much and can often attract specific crowds to the system. People will buy consoles for more niche game types like Bayonetta or Horror titles.
Plus it isn't like Sony doesn't have a desire to aim for a diverse library. A platform holder needs to have a wider range of game releases to have a healthy platform, especially with a now four-way fight between Nintendo, Sony, PC, and Xbox families. You'd want to make sure your platform has games that cater and appeal to multiple different types of gamers. Last generation had the Wii U and Xb1 have major gaps in their genre libraries and look how that went.
Narrowing your content output is not what a platform holder needs to do. What they need to do is have a wide breth of content to not only attract customers, but encourage healthy game ecosystems. Similar games from a first party prop up third parties.
Nintendo example: Fire Emblem attracts strategy gamers who in turn play games like Wargroove or makes people like the genre and consider playing more games like it. Sony only making a certain type of game limits that...
The Democratic Nintendo fan....is that a paradox? I'm fond of one of the more conservative companies in the industry, but I vote Liberally and view myself that way 90% of the time?