TLDR - I get where you are coming from, but most young people don't think of non-nude anime as sexual - it's just one aspect of global pop culture art to them, even though it seems creepy to you.
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Everyone judges something based on how it compares to all else they've been exposed to over their lives. The concept of "everything is relative" works automatically and subconsciously. (This is indeed one principle exploited to ensure the continual erosion of social standards over time. Separate argument and not one of my points here, but it is related.)
I've heard that decades ago HBO would not broadcast an R-Rated film until late evening each night, when the adults had supposedly sent the kids to bed. Now kids are exposed to "adult" content all day on hundreds of channels, not to even mention the internet.
Looking back even further - in 1956 a newspaper critic wrote that pop music "has reached its lowest depths in the 'grunt and groin' antics of one Elvis Presley." Yet Elvis would be considered laughable and tame now. Not saying either views are right or wrong, just that the concept is different one time and place from another.
Look at photos of female swimsuit fashion in each decade since 1900. Each generation would have been shocked at how much skin would being shown 20 years later. And they'd pass out from shock seeing a bikini of today. Imagine a lady who wore 1900s full-body swimsuits complaining about how it's completely obviously wrong that any girl in 1950 could show her belly in public in a two-piece swimsuit.
Anyway, I filter what I don't like and move on, and try to remember that my version of reality is fact to me but everyone else has their own version too. Just because something bothers me does not mean it is illegal and must be banned.
Not trying to say annoying anime posters here are correct or adding any value, just that they are free to post like everyone. (And free to get filtered by most)