Because I’ve talked to people who say things like that and it just makes me lose my faith in humanity a little 
But I have to remind myself that this tagline is some western Marxist (or maybe socdem?) verbal diarrhea and isn’t common among the people who matter
Most taglines really are bad vibes. Sometimes they are sort of funny. I only like the ones that say things like "tocopherol needs to log off" or links to a good essay or book that sometimes appear. It would be interesting to see a straight yes no vote on the question "do taglines help your vibe?" Why should we encourage an irritating thought most times we look at the front page? Usually it's just a mild irritation and not very serious, but if someone wants psychically damaging takes on socialism you can go to basically anywhere else to see that.