Mostly because many on that camp are averse to nice tooling, like REPLs, JITs, or incremental compilation.

They do exist, but again, not really loved enough.

https://clang.llvm.org/docs/ClangRepl.html

https://github.com/jupyter-xeus/xeus-cling

https://root.cern/cling

Additionally, while in the past there are been nice high level libraries for C++, which is where Java took its inspiration from in first place[0], current culture seems to hate having such frameworks around, and they are mostly gone nowadays.

[0] - It isn't writing Java in C++, rather how C++ inspired by Smalltalk used to look like, 1983 - 2000's, before Java got released in 1996.