Yes, impossible to know anything that one hasn't personally experienced, which is how it's impossible to write about anything outside the bounds of real life or to ever empathize with and reliably recreate experiences that are not one's own.
Come on, fiction is fiction. Sometimes creators can only draw from their own personal experiences, and much more frequently a story is born of pieces of personal inspiration that a reader might never have guessed at, material gathered from other people, general research/life knowledge, genre conventions, and straight up making things up.
Once, people kept asking this yuri artist if a particular series came from personal experience. She said no. And then she said "people ask if I made the story based on personal experience for every one of my [distinctly different] series. XD"
well, yes and no. The slight distinction here is that I consider all of this
material gathered from other people, general research/life knowledge, genre conventions, and straight up making things up
as being included under 'personal experience'.
But that is a purely semantic difference.
Thank you for uploading this, by the way! Fantastic work.