That's because you don't write bugs. Health check are only needed when you're planning on having bugs in your system. Instead of doing monitoring I prefer to spend a bit more time fixing all the bugs and then my systems never break so no monitoring is needed. Of course the downside is lack of job security. They can fire me and the system will just continue running forever, no support needed. If you add some bugs they cannot fire you because someone needs to keep fixing the broken system.