Why can't Jaws be a Russian submarine?

Hollywood may have gotten a little more woke of late, but every screenwriter who has ever had a pitch meeting go off the rails will appreciate this one:

“I was told how one studio head said in a meeting, ‘This script is fantastic. Let’s get Julia Roberts to play Harriet Tubman.' When someone pointed out that Roberts couldn’t be Tubman, the executive responded, ‘It was so long ago. No one is going to know the difference’” (Gregory Allen Howard, writer-producer of the Tubman biopic, recounting early days of two-plus decades trying to get the film off the ground).

Even now, it's an even bet there is more than one development gnome hoping to route the Underground Railroad through Wakanda.