Thank you. I like your answer. 
Could be any number of things...
They may think that repeating it often enough will make it true.
They may not understand the scoring system.
They may not know enough about skating to see where points are being earned.
Or they may love certain skaters, and simply hate all others. Their favourite always deserves to win, and is undermarked if they don't - and any skater who scores more, must be "overmarked".
Occasionally though, they may actually be right...! There is a subjective element to judging, so there will rarely be 100% agreement, and apart from that - even with the best will in the world, they are human and will not always get it right. There have also been scandals in skating history, where judges have cheated. (I mean actual proven cases, not Sochi-style conspiracy theories).
In Hanyu's case, I'd say he generally deserves his points. Occasionally, there is a reason to think that judges have been "generous", but I'd say that's rare and I don't think he is regularly overmarked.


If he skated to easier programs, maybe he could skate more smoothly? But I'm not sure. Anyways I'll see by myself at Worlds