yup - then they can also ignore any human rights related requirements in the treaty - cause it’s not actually accepted as a treaty. Odd thing is; it becomes like an amendment to the Constitution in force - burying any actual Constitutional requirements in its path.
The US also has the “activist” judges problem - transforming large areas of private issue law into “social policy” and “economic policy” on the excuse that they have an economic or social dimension. This blocks use of individual rights arguments, and shifts power to the legislature to create any arbitrary control they wish. Family law is the best known example. Family is now legally regarded as an arbitrary government choice, and nothing related to family is any longer constitutionally protected from government intrusion.