Why does Microsoft xbox scorpio need exclusives when the top best selling games are multiplatform?

[Snoopy]

aLkaLiNE said:

Snoopy said:

But most people don't game on a PC. People can build a powerful pc right now and play all the best selling games on xbox one and ps4 significantly better in graphics and fps.

Then why has playstation dominated 3 out of 4 gens? According to the Internet, it has the inferior network and controller so it can't be those reasons. 

Because of third party with psone and ps2. Ps3 fucked up signifcantly with price, but still has the big brand name (especially in Europe) to keep it alive. Even the best selling games on ps3 are 3rd party. Ps4 sony got the price right and sony playstation brand name is huge. Sony started at the right moment where people still associate games like FF,MGS,RE, ect as playstation games.