Exactly, another thing people don't understand or just plain don't have enough working experience in life to comprehend is when you have partnerships in place with people or company's and they already fulfill certain roles or needs then you don't need to necessarily over extend by buying a company up from fear that someone else might or some other non essential reason. History has shown time and time again that Sony has excellent 3rd party support (such as SE that provide content in various ways benefiting both parties) its essentially why it hasn't happened already (a buy out, and also probably because SE is not looking to be purchased) because there isn't a need for it, 3rd party's are already providing exclusive content without the need of making much larger investments or commitments.
Another thing i notice alot on here is people wanting a JRPG specific dev inside SIE. I mean i get it but WHY? Sony has partners that already fill that need without having to build a specific studio inhouse for that (level 5, square, countless others etc.) Jeff (i believe his name is) who worked on days gone and was on Jaffes youtube stream a few weeks ago also said something that i thought was very interesting. IF theres a team in world wide studios that wanted to make a JRPG then you better believe thats what they would make, granted it goes through the normal pitch process and approval, so theres really no need for specific genre based studios. Guerilla is the perfect example of going from something like killzone to horizon..