It is. Which is why it will never be mainstream.
Game of Thrones is too violent.
The Witcher is too confusing.
The Mandalorian is just right.
That's what you're looking for.
First 40K book I ever read was
Draco (The Inquisition War) - and I went 'backwards' and read
Space Marine very soon after - and I remember
it still (perhaps more accurately, I'm scarred for life...
). What's your point?
I think you could adapt Czevak's story (
Atlas Infernal) pretty easily:
Indiana Jones-in-Powered Armour with a memetic-virus (read; Hollywood!Autism), and uncovers a Book on some planet with his ensemble crew (which includes a Space Marine Techmarine, who can espouse technobabble, who is akin to Beast, of
X-Men, who is both strong and smart, depending on what's required. The exact same impetus that encourages nerds to take up ju-jitsu [like I did].).
Skeletor-in-Power Armour Ahriman wants the book.
Space Clowns attempt to both help and hinder Czevak, whilst only hindering Ahriman.
Since Czevak's meme-brain (read; Hollywood!Autism) has allowed him to both read and/or memorise the
Atlas Infernal. Acquiring the Book, is Plan A. But since Ahriman can't read it, and it keeps changing so he can't memorise either, capturing Czevak is Plan B.