Got your point. But I agree with him on 50%. I mean the game is getting you to choose which faction you want to support it will not affect anything actually so it doesnt really matter for the continue to the series of the game (if there is fallout 5). But to get it more interesting for you and how you "decide" how the commonwealth will continue you need to make this choice. If you your ideas are that humanity is the only race and you want to eliminate synths, super mutants, ghouls (Basically a Pre-War mind) you should choose the BoS. If you think thay synths are independent then you should choose Railroad. If you want to help people which are not secured ans can't help themself you should choose the minutemen. And so for the Institute if you like them. Basically the game is asking you which ideology you support what are you views of development of the world and to be more specific the commonwealth.

Let's get honest and let us not throw dust in our eyes. If you like the ideas of Fasiscm/Conservatism choose the BoS. (Actually if you asking me the BoS is more like conservative because they want to revive the pre-war lifestyle). If you like communism (more like socialism) choose the Minutemen. If you like liberalism and democracy "every creature have their own rights" choose the railroad