It's because they have nothing to say. In having nothing to say, they are also completely nonjudgmental. Anyone can say they like Spy x Filler or Demon Slayer, and it would say absolutely nothing about them. Normies can watch them without crossing the line into "anime fan" territory. No opinions are asked of them, because there are no sides to take. Without any opinions, no thinking is required. It's a safe space for centrists to continue not having opinions on anything while feeling good about themselves.
Animes like this don't bother to explore anything deeper than superficialities and are comfortable remaining there. That itself isn't criminal in a show, as there are plenty of feel-good shows that only set out to do that, but in such settings with supposedly serious undertones with supposedly real stakes on the line, it absolutely is.
This season is a meandering mess where nothing happens to drive the main plot forward. The only thing this anime manages to achieve is draw skilled animators away from other projects where their work would have gone toward something actually worthwhile.
