I mostly agree. At this point though, each side tries to circumvent it anyways by at least stretching "interpretations", and the courts tend to allow it.
I'd rather have that than have the constitution easier to amend. Otherwise the whipping back-and-forth on constitutional issues as each party takes power would be extremely destabilizing and legally chaotic. It already is; don't make it worse.
I don't see how the abuses in the current system make it less chaotic. Regardless of whether I like or hate the specifics of a topic where a legally dubious mechanism was used to accomplish it, I hate the concept that both parties abuse and mis-use the governmental mechanisms to accomplish what they want.