Anime has the same discoverability problem as film and other media.
The anime that you mentioned are things that are popular _right now_. There are a few shows from a decade or so ago that people are told to go watch and do but only a few.
How many newly minted anime fans do you know that are going and digging through the 80s and 90s OVA trash that really defined the medium? (and for every one of those there are 50 more who will complain to you about the animation quality because they were raised on nothing but full CG animation...)
That's just as niche as being a cinephile is today.
The anime that you mentioned are things that are popular _right now_. There are a few shows from a decade or so ago that people are told to go watch and do but only a few.
How many newly minted anime fans do you know that are going and digging through the 80s and 90s OVA trash that really defined the medium? (and for every one of those there are 50 more who will complain to you about the animation quality because they were raised on nothing but full CG animation...)
That's just as niche as being a cinephile is today.