Settings are a tool for GMs, not players.
Part of WotC discovery in building 5E, IIRC, is that DMs are overwhelmingly the ones who buy all the books, even the PHB. 5E books are designed for DMs.
How about we look at the discussion from a different perspective....
Which of the following books would, by itself, allow a GM to run a Chult based adventure not featuring the Death Curse with the least amount of effort?
1. The 3e FRCS
2. The 5e SCAG
3. Tomb of Annihilation
Bingo bongo, number 3 by a country mile...