Earlier quoted context omitted.
If it’s not written down, anyone can interpret it any way he likes and debate this for the next centuries. To avoid this kind of problem, it is a good idea to have representatives of the people write it down. And yes, it will never be perfect, and it will get outdated over time, etc. etc. Still better than millions of different mental interpretations. Also does not change the fact that the people can request a change…
Oh like USA's endless amendment debates and "common sense X" acts?
The US has two issues as far as I can tell: one, (small) constitution amendment should be a normal, regular process, but because it has not been done, now it has become some sort of sacrilege to some, at the very least a “very big deal” to most. Second, the political landscape is so polarized, one aisle will say “no” before the other aisle has uttered the first word. You can’t legislate anything in such a situation.