> It's only recently that congress has decided that we can't amend the constitution, despite that being such an important and essential part of how the constitution was supposed to work, that the founders put together a bunch of amendments before the constitution was even ratified.

Congress hasn't decided this. It's just gotten so polarized and dysfunctional that getting the broad consensus needed for meaningful amendments is seen as not worth it, because it's a foregone conclusion that it will fail.

And that's why, instead of passing laws and amendments, we over-rely on the reinterpretation of existing laws using the judicial branch and give more powers to the executive branch when possible. It's to deal with perpetual gridlock. (I'm not saying this is good, BTW; IMO, we need to reduce gridlock in general).