Well said.
Also, from a purely financial perspective (which is the main criteria by which EON/MGM/Universal will be making their release decision, releasing a film with such a plot point in China and the US, two of the three hardest hit countries at this point as well as the two most important nations in terms of box office for Bond, probably wouldn’t be the wisest of moves.
Then, and this is a small consideration but one possibility nonetheless, there will be those who are ignorant and will claim that Bond is trying to capitalize on the tragedy, drawing some unwanted and undeserved negative attention to the film. Anyone with a functioning brain would be able to figure out that the film was in the can before this crisis became a global issue, but, at least in the US, having a functioning brain isn’t necessarily a prerequisite when it comes to having a platform on some form of media to spout out such nonsense.