Earlier quoted context omitted.
Config test is a human operation; you manually do it after you've edited the configuration, and if you've forgotten to do it then the next start will crash. It makes no sense to automate configtest.
> It makes no sense to automate configtest. Sure it does! It's a belt-and-suspenders approach that ensures that human error won't cause your system services to become unavailable. Why use a computer unless it automates tedious tasks for you and remembers to do things that you might forget? The Gentoo OpenRC BIND 9 init script runs named-checkconf every time you try to start or stop the BIND service or reload its conf…
If it doesn't do this automatically, there's still the option of adding the configtest in the ExecStartPre option.