I think this is a good question and NOT monitoring services is something I need to fix. Consider https://blog.wesleyac.com/posts/how-i-run-my-servers. His unit files do not mention any monitoring. There are a variety of sysadmin things I'm bad at. For example, I do not know off the top of my head where to look for cron job failures or the IP addresses of malicious ssh login attempts, to take two examples. This concerns me because normally I'm very curious, and even a bit of a completist, but when it comes to sysadmin tasks I tend to "hope for the best".