Semantically, it should be, but, on account of the way C++ does things, at some point it is very likely to be destroyed, and whenever that happens, you want it

Semantically, it should be, but, on account of the way C++ does things, at some point it is very likely to be destroyed, and whenever that happens, you want it to be in a state such that the running of its destructor has no consequences for the rest of the program.