Sony's gaming division is a pretty small part of the company, though it's a bigger percentage now than it was even ten years ago, and it was always about encouraging secondary purchases which would likely also be Sony products. The playstation was created largely to get media players into people's home, because there's a good chance Sony publishes the media and makes the TV/stereo you'd play it on, especially in Japan. The first playstation was a trojan horse CD player, then the PS2 was a DVD player, the PS3 was a bluray player, PS4 was bluray 3D, PS5 was digital and UHD Bluray. For a lot of people, their gaming console was the first or only device they had to play these things.
Sony's gaming division is a pretty small part of the company, though it's a bigger percentage now than it was even ten years ago, and it was always about encouraging secondary purchases which would likely also be Sony products. The playstation was created largely to get media players into people's home, because there's a good chance Sony publishes the media and makes the TV/stereo you'd play it on, especially in Japan. The first playstation was a trojan horse CD player, then the PS2 was a DVD player, the PS3 was a bluray player, PS4 was bluray 3D, PS5 was digital and UHD Bluray. For a lot of people, their gaming console was the first or only device they had to play these things.