I do. It's fine, recasts are fine. I've never had a problem with them. They could have recast any deceased actor and I would not have an issue.
Chadwick would have never said that no one else can play Black Panther but him. William Hurt would not have had an issue with Harrison Ford taking over. This idea that it is taboo is all in our heads, but really none of them would have minded.
People love Brandon Routh Superman, yet he plays the same Superman that the deceased Christopher Reeve played. Christopher Reeve Superman is arguably more culturally significant as a whole than ANY other superhero movie character.
Even if Robert Downey Jr. passed away, I would recast. It doesn't matter who it is, I just think recasts are perfectly acceptable.