Well I can't really think of another reason. If sony wanted a spec war, they could have launched around the same time as MS to match them and continue their trend. Sony has invested a lot in their vr and it seems to me that the og ps4 doesn't meet their initial vision for it though it can run some titles. So they made the neo. I mean it hasn't even been 3 years since the ps4 released. There was no reason to rush a new console out like this.
I laughed because that particular post you responded to was a conversation he and I were having that started with "Neo is for PSVR" and I was suggesting why it isn't