baljeet ji
I personally do not think of the ceremonies in SRM as "rituals" nor do I consider the SRM a collection of mindless rules. The SRM was, based on historical accounts, an attempt to do exactly what you have said: "deduce" teachings of Sri Guru Granth Sahib Ji and lessons from Sikh history, to apply them as a set of by-laws that define the panth, in the parliamentary sense.
Consider how SRM begins. It begins with the chapter "Who is a Sikh!" It ends with instructions for how to change and resolve matters that are important to the panth, all Sikhs, through the process of "gurmatta." This process has been ignored by the politicos in the past 50 years, and so an entire generation, perhaps 2 generations, have no sense that the SRM contains instructions for gurmatta, which is the embodiment of the democratic process for taking panthic decisions, common after the death of Guru Gobind Singh ji.
I believe it is a brilliant document, even with its sometimes antique contents. And there are indeed ongoing discussions to change it. Eliminating the naming ceremony or kesh is not part of the plan. This is the plan: to remove the part of the definition where a Sikh believes in one God, and the prohibition against tobacco. This proposal has been tabled indefinitely. Clearly it is part of an effort to make Sikhi easy for the saffron samaj, who have always resented the fortitude of a people who will not let go of their identity, and are loyal to it. Make it easy to be a Sikh, so that Sikhism will disappear.
Bylaws, in the parliamentary sense. Why are they different from rules? Bylaws work almost like a constitution. They define an entity. They lay out the laws by which the entity governs itself as an entity. They become the supreme governing authority. Without such a document the organization does not formally exist. In our case the panth would not exist. There is deep history in the evolution of SRM. The panth needed such a document in the 19th and 20th Century to be formally recognized as a panth.