Why does nobody seem to think that `null` is a serious problem in D?

[Tony]

isocpp.org just had a link to a blog post where someone makes a 
case for uninitialized variables in C++ being an advantage in 
that you can potentially get a warning regarding use of an 
uninitialized variable that points out an error in your code.

https://akrzemi1.wordpress.com/2018/11/22/treating-symptoms-instead-of-the-cause/