What's the point of having a constitution if things you think should be illegal can just be redefined to not be covered by it? The constitution was supposed to provide hard red lines.
Trying to define something simple and universally applicable is a fool's errand, because people will disagree, and even if it's just you, reality will hit you with exceptions and curveballs if you look hard or wait long enough.
The point of the constitution is not to satisfy a need for simple, unchangeable rules that need no interpretation whatsoever.
If you look for the point of the constitution, here's one explanation from the horse's mouth:
> We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America.
It's ground rules. They will necessarily require interpretation, as all rules do. What that interpretation should be and how far it should go is part of that, and has been ongoing ever since, as would be expected.