I think you have absolutely no idea what you are talking about… Metal Gear Solid 5 is developed on the Fox Engine, It’s the same engine P.T was developed with. They don’t have just a Directional and Skylight, they also have a very good GI solution basically they are also using light probes.
Left side, just directional and sky light. Right side, generated cube map for GI and light bouncing / indirect light.
The same goes for the Witcher 3 and all the other games, all of them are using some kind of GI and indirect lighting, no matter if probes or fully dynamic GI. A game developed only with the power of a directional and sky light, will have no GI, will have no indirect lighting / bouncing… as a result it wont look good.