Never heard of Denis Healey’s first law of holes, I see.
Let me explain. The College is a charitable trust governed by certain members of the Fellowship, who are Trustees under the college’s statutes and the Charity Commission (the UK govt regulator of charities). That is the college’s “governance”.
The JCR is the student social society. The students elect members to be on the committee each year, like President, Vice President, Entertainments Officer, Communications Officer, Treasurer, etc. Any post that the JCR decide they want. Like any student society, once “elected”, the JCR committee can write any statements they like based on their own opinions. They don’t even need to represent any consensus by the student body. The document you link to is the personal opinions of that year’s student social committee, and nothing to do with the college’s governance.
Anyone can submit evidence to a government consultation and it gets recorded in Hansard. You don’t fully understand the material you’re making reference to. I imagine it’s because you don’t have a clue about the U.K., which is painfully obvious to all of us here.