Among various reasons, a) protecting dollar as the global exchange currency (Iraq had started to exchange in Euro), which can potentially lead to the collapse of the American economy; b) secure the oil reserves to finance the higher future goals (so oil is not the reason but a major financial source)...
Playstation 5 vs XBox Series Market Share Estimates
Regional Analysis (only MS and Sony Consoles)
Europe => XB1 : 23-24 % vs PS4 : 76-77%
N. America => XB1 : 49-52% vs PS4 : 48-51%
Global => XB1 : 32-34% vs PS4 : 66-68%