This site is horribly complex for creating a plain-text file with four fields.
Perhaps, the complexity comes from having 10 contributors.
_Not everything needs to be a large project._ A template right on the webpage would have the same value. That raises the point that a blog post about the RFC would have greater utility.
There are people out there who spend the time and effort to create a good looking site, even for something as simple as generating a plain text file with 4 fields. Your comment would have greater utility if it was actually about the subject of the site itself, and not about how it was designed.
In practicality, I don't see a need for this .txt file to be present. There are other .txt files, such as humans.txt, that don't have widespread adoption, due to lack of generated value.
While there are many issues inherent in reporting vulnerabilities, this .txt file will not solve them. Not only is the file's existence error-prone from a maintenance perspective, but my experience has shown me that such a file is not needed.
Due to these factors, I believe that the existence of such a file is unwarranted complexity without a corresponding level of benefit.
_Not everything needs to be a large project._ A template right on the webpage would have the same value. That raises the point that a blog post about the RFC would have greater utility.