GP is talking about a world where you can't shop on Amazon because you committed wrongthink on Twitter.
Is it necessary?
Well - for many people literally the only way they communicate with their friends is in group chats on social media platforms. Losing that leads to social isolation.
Is it equivalent to the real world?
Of course it isn't equivalent - as in "the same as" the real world. For many people it is much much more important since most of their life is lived via online mechanisms.
My point: They can "check" all they like. In many places, various personal background issues are protected by labour laws.
Also, your post makes it sounds like being denied a rental apartment contract is unreasonable for someone with poor credit history. Would you rent to that person? Again: Some jurisdictions do not allow credit checks or do not allow /discrimination/ due to credit checks when renting.
I agree: Many items in the background check are ridiculous. Many years ago, I worked at a company where many of the Big Shots were regular, recreational cocaine users (confirmed by juniors who went bar hopping with them once a week). All new employees were required to pass drug tests. It was absurd. In that era, even marijuana was enough to have a job offer withdrawn.