My guess is that they're not included due to internal politics. They were developed by Russinovich before he joined of Microsoft. I believe he mentioned in an interview that he used some undocumented windows APIs and that some Microsoft engineers were not happy about that.
BTW another great diagnostics tools for Windows that I've come across is the Windows Performance Analyzer. One needed to install it separately before, not sure about that nowadays.
BTW another great diagnostics tools for Windows that I've come across is the Windows Performance Analyzer. One needed to install it separately before, not sure about that nowadays.