Most definitely. People would still want to read them though.
> The right of the general public to read the unpublished novels
Such a right doesn't exist.
The public doesn't have a right to force expression.
The artist has the right to choose when and what he publish. We should respect that (and I'm a huge fan of T. Pratchett). Maybe they were not up to his standard, too unrefined...
Since when such a right exists? Did you just make it up out of thin air?