There’s a process for that. The authority to override or change the constitution is not given to a single government branch but to the states. We’ve had an amendment as late as the 1990s, so it isn’t as of the constitution is immutable.
The authority of each government branch is explicitly enumerated. I’d rather them behave according to the contract they are beholden to than decide they have whatever authority they wish. That’s no longer a constitutional republic.
I’m not saying that a constitutional republic is the end all, be all. I’m just saying there is a process for getting things done and it is supposed to checked by the constitution and the other federal branches. That can be changed by amendment or revolution, but should not be changed by the whim of politicians.