Typo or peculiarity related to `setup.ilm.check_exists` in documentation

The documentation for Metricbeat (beats/users.asciidoc at master · elastic/beats · GitHub) says:

When using ILM, turn off the ILM setup check

The documentation (Configure index lifecycle management | Functionbeat Reference [8.6] | Elastic) also says:

If you set this option to false, lifecycle policy will not be installed

So when using index lifecycle management (ILM), the lifecycle policy is not installed.

Is this a typo or a peculiarity?

Correction: the top post links to the Functionbeat documentation, but this question regards Metricbeat.