Oathkeeper: why http methods are restricted?

Stating that RFC 7231 Section 4.1 does not limit HTTP method and defines it as

    method = token

what are the reasons of restricting the available http methods in oathkeeper?

This kind of restrictions prevents not only custom methods, but also WebDAV methods and an application exposing a COPY or MKCOL actions cannot work with oathkeeper.

The only workaround is to call the decisions api faking the method of the request.

Open to support them!