Because with Marvel, that's where it starts. It's never where it ends. The past 10 years, last 5 especially, they're known for 2 things -- sub-par and falling art, and sub-par woke bullshit writing, both caused by diversity hires who are immune to editors.
If Marvel continues to be Marvel, I can guarantee you by the end of these Comics we'll have (pick your favorite):
- Some form of "Non-Binary" bullshit shoved in just to "piss off the right kind of people," (the sane) -- possibly an AdMech, since they already started shoving "Nonbinary AdMech" into the BL books.
- A Space Marine who was TOTALLY SECRETLY A STUNNING AND BRAVE WAMMYN who went out in an AMAZING BLAZE OF GLORY which leads someone important (Cawl, maybe) to ask whyfor we no use more STUNNING AND BRAVE WAMMYNS for Marines. Possibly with the ending showing a bunch of of STUNNINANBRAVEMARINEWAMMYNZ in test tubes awaiting Cawl to activate them.
- Gay Space Marines, probably with a tragic end, like one of them dying and the other going berserk in response. Bonus if they get to retcon some existing character gay, like I dunno the Lion or Cypher or something.
- A Custodes lecturing someone on how the Emperor's REAL plan for mankind's future was SPACE COMMUNISM because he was KARL MARX in one of his incarnations.
... ok, that last one might be a bit far, but who knows. The point is that Marvel is known for retconning shit to "fix" things and they couldn't wait a single book before they started doing it to 40k.