Here's a novel idea. Stop consuming content that doesn't interest, or even offends, you. Clearly it's not something you should be wasting your time on.

Because Japan considers maturity to come earlier than 18. And Japan can distinguish between fiction and real life

Especially in North America and Europe

It's fiction. It's pen and paper. So one would start there's nothing wrong. Just like you enjoy slaughtering people in God of war but won't consider maiming people with blades and axes in real life ok. I don't enjoy it you don't but if someone does, there's nothing really wrong there unless you consider murder not ok in the arts. You need to learn the difference between fact and fiction. The japanesJ are very conservative in real life and they would never tolerate this in real lofe

Fiction is fiction, liking kill la kill because character girls looks yummy doesn't make you a bad person. If you try dating an underage girl then you are a bad person and deserve punishment

Having sex with a pubescent person isn't pedophilia even in the US. It's against the law for some reason but it's certainly not pedophilia. Or else every 14 year old with a sex partner is a pedophile. And if you want to get really technical finding an underage or even a child sexy is not instantly a philia, because philia disctates that it has to be a preference over everything else rather than just mere attraction. So don't worry, that you feel sexually aroused by a 16 year old girl in skimpy clothes does not make you anything out of the ordinary. It's natural and healthy.

But to get back to your initial point, this isn't a recent development. Since manga and anime exploded in Japan it has been catering to every single genre, age group, fantasy, you name it. It's natural that some are of sexual or titillating nature because people enjoy it. it's also extremely popular overseas. I'm pretty sure that more people outside of Japan enjoy anime and Manga than within Japan. Despite all the lewd stuff coming from there and an absolutely booming porn industry, the country is very prude and you will be eyed by a regular citizen if you read your loli porn on the train just as in the west. In some ways they're both more progressive and more prude than the west when it comes to sexual material.

This has been going on for decades in japan. It’s not something that started yesterday. Different culture. Different ideas.

You're a few years too late with this topic. Some people like it, some people hate it, some people are neutral about it, but it's old news.

Usually can't tell age when it's anime. Usually.

What anime are you talking about? I want to see it, for research purposes.