Wow, you're seriously underestimating this issue. For instance, the German constitution ("Grundgesetz") has an eternity clause in it that makes it unconstitutional to remove the basic principles in Articles 1 and 20. Many other modern constitutions have such clauses.[1] By the way, Article 4, paragraph 4 in the German constitution states: " All Germans shall have the right to resist any person seeking to abolish this constitutional order if no other remedy is available."
If constitutional assemblies worry about things like that, it's not as silly as you put it for Gödel to have wondered about not having such features in the US constitution at a time just after WW2.
If constitutional assemblies worry about things like that, it's not as silly as you put it for Gödel to have wondered about not having such features in the US constitution at a time just after WW2.
[1] https://en.wikipedia.org/wiki/Entrenched_clause
Edit: Not a minor nitpick. Article 1 AND 20. Fixed!