How often do people even encounter this issue?
I have been using YAML for 5+ years and have never had it before.
Further, I use `yamllint` which points this out as a lint issue "truthy value should be one of [false, true]".
Ansible has a pretty common issue with file permissions, because pretty much every numeric representation of a file mode is a valid number in YAML - and most of them are not what you want.
Sure, we can open up a whole 'nother can of worms if we should be programming infrastructure provisioning in YAML, but it's what we have. Chef with Ruby had much more severe issues once people started to abuse it.
Plus, ansible-lint flags that reliably.
See also p95 but the same couple of users always see the p99 time, due to some bug.