Markdown inclusion: this does not throw errors if your file is not present. Why??

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"Markdown inclusion" section contains the warning:

Note that this does not throw errors if your file is not present. Hence, when using this feature make sure that the contents are being rendered as expected.

Why is that so? Is there any reasoning behind this decision?

IMO, throwing an error is totally essential for this feature to be usable. The suggestion to "make sure that it is rendered fine" is not suitable for any long-running documentation project - people do make mistakes anyway. Having an automated tool that will not allow you to make mistake is a way to build a robust software. Moreover, this feature seems to be trivial to implement.