My problem in 40y of programming is still making bugs and those I make come from not thinking about edge cases or from wrong assumptions and not from being lulled into writing tests to meet a 100% number.
But personalities differ and if being lulled into security by writing towards a 100% number is a problem for you I would be careful, I totally agree here.
I agree that fuzz testing+linting can help you. However from my persective lower level tests help you to build trust about the software you're releasing.
My problem in 40y of programming is still making bugs and those I make come from not thinking about edge cases or from wrong assumptions and not from being lulled into writing tests to meet a 100% number.
But personalities differ and if being lulled into security by writing towards a 100% number is a problem for you I would be careful, I totally agree here.