Is zero trust just the same idea as agile 'fixing' waterfall? I.e. is it just another 'practice' marketed to solve an existing people and process issue that ca

Is zero trust just the same idea as agile 'fixing' waterfall? I.e. is it just another 'practice' marketed to solve an existing people and process issue that can be readily solved with proper focus , which just introduces its own issues anyway? Like sure, zero trust will work IF you do it really well, but then so will the existing environment.