People either privilege the pursuit of truth or they privilege gratifying their ego in the form of social acceptance and moral validation. If you do the former your priority is cultivating as accurate a conception of the objective world as possible regardless of the degree to which that conception conforms to fashionable opinion. If you do the latter you simply adopt whole-cloth the generic opinions of the social class with whom you desire to be identified and uncritically internalize them as your own.
That is why people who gravitate to the Left are so consistently incapable of presenting logically coherent, properly reasoned arguments to support and substantiate their opinions when challenged. Their opinions are not the end result of a process of independent critical scrutiny and objective analysis. Therefore they have nothing behind them to link their claims to objective reality or to justify their confidence in the perfection of their interpretations.