Knowing you have a code coverage of 69% is helpful. However it doesn't help improve the code coverage and manually inspecting the coverage files is not very rewarding.
This would also make it easier to find false negatives in coverage.
For it to be useful, some type of lines (multi line comments ...) should not be counted as lines which can or can't be covered but a neutral third thing. If your coverage would change because you delete old comments that would be surprising.
Knowing you have a code coverage of 69% is helpful. However it doesn't help improve the code coverage and manually inspecting the coverage files is not very rewarding.
This would also make it easier to find false negatives in coverage.
For it to be useful, some type of lines (multi line comments ...) should not be counted as lines which can or can't be covered but a neutral third thing. If your coverage would change because you delete old comments that would be surprising.