Highly disagree with the OP on the fact that anime is perfect and causes sentimental feelings but he has somewhat of a point.
When I first got into anime, I was younger and I liked it for not being as ugly and bland as most western cartoons airing at the time. It had action, pretty characters and was darn cool to me at that time. Nips really know how to draw people into their works.
However I got older, and realized that anime isn't "all that". Same formulas used in every genre, same character archetypes, similar stories, etc. etc. It wasn't that anime was bad, however it is simply a type of media that panders to an audience, so of course these things were going to happen and years of watching it was going to make me notice this. So whenever someone told me anime was a "masterpiece" or "profound" (like Madoka Magica, Lain, Cowboy Bebop, etc. etc.) I'd simply view the anime as mediocre or not as thought provoking as people thought it was. (Truthfully it really wasn't to be honest).
I feel like japs feel the same way, especially since they live around this stuff unlike the westerners who overrate it. Anime/light novels as a medium is largely directed at teenagers and children. Even the "seinen" anime are. Adults seem to be more into manga, visual novels, and video games. The only anime that really attract adults seem to be "moe" or fujo//u/ pandering (and maybe even isekai). Every other anime seems to have a smaller older adult audience and a larger child/teen/young adult view group.
Why is this? I guess it has somewhat to do with the "take it easy" phrase that /jp/ uses. Jap adults have to work arduous schedules at their jobs and their lives are constantly filled with stress and trying to have a good standing in society (high suicide rate is not there for no reason). That's why they love simple "moeshit" anime like Kemono Friends and Is Your Order a Rabbit? The characters are cute, the anime is easygoing, and it simply relaxing. No shounenshit and deepshit with constant shoving down philosophy and morals down your throats, none of that. Who wants to hear the same dull kindergarten tier philosophies over and over again that every adult is perfectly aware of after they come home from work? People rather watch something more comfortable and enjoyable. Probably why isekai is popular over there too. They can self insert into another world away from their stressful lives.
So, I guess I have a love hate relationship wiPost too long. Click here to view the full text.