Anime is thought up by Japanese people with Japanese experiences and Japanese habits. Therefore, characters and events tend to be based on Japanese life to some degree. However, these are almost entirely in the details, the things that make the story feel natural.
No, because anime characters are just the imagination of Japanese and I don't find any significant resemblance (physically) between Anime characters amd Japanese people. Yes, because they are so much obsessed with Anime that they try to be like them.
TL;DR: Yes. It is safe but with a catch. Streaming services that have a license to broadcast content within Japan such as Niconico are ideal. Streaming services meant to distribute anime abroad such as Crunchyroll and Hulu are also legal to view in Japan.
Thanks to a surge in Chinese interest, anime sales are now booming: in 2015 alone, sales of the Japanese cartoons rose by 79 percent, with more than half of that increase coming directly from Chinese buyers. Having captured the hearts of the Chinese youth, anime is now coming for their wallets too.
According to a survey conducted by the Nippon Research Center in October 2019, around 33 percent of people in Japan stated that they often read manga or watch anime. A slightly higher share of 41 percent of people said that they do not often engage in this pastime.
Anime Top 10Top 10 Best Rated (bayesian estimate) (Top 50)#titlerating1Fullmetal Alchemist: Brotherhood (TV)9.082Steins;Gate (TV)9.043Clannad After Story (TV)9.028 more rows
Anime, for most japanese, is nothing more than a form of entertainement. They dont think much of it, the problems they may have with it, video games or anything really, is the same any sane person shall have: deviant uses of the medium.
Watching Anime can certainly be a useful tool to learn Japanese language. Yes, people can learn at least a bit watching anime! Although it may be tricky at times, it is possible to enjoy and learn Japanese at the same time.