The USA's written constitution should not be used as an exemplar of written constitutions in general because the founders didn't even enforce it the day after it was ratified. It took a civil war to even turn towards the words as written. The document itself was more aspirational than a reflection of how the founders intended to live and govern.

As a result of all of that, we have developed a culture of sophistry around simple words. We pretend the Constitution binds us, but in practice the structures that govern the country are much more opaque and therefore more difficult to change.

(This is why every so often we have to ratify a new amendment codifying rights that are clearly enumerated in the articles of the Constitution or in an earlier amendment. At some point, the sophistry tips over and we have to amend it to say what was plainly written in at some earlier point.)