If there are laws we shouldn’t enforce, we should just get those laws off the books.

I believe it's a fairly sane and desirable that we hold people accountable for arguably mishandling classified information (regardless of intention to mishandle) and sidestepping established procedures to communicate in an official capacity. It's very reckless behavior and many people were involved in enabling this behavior.

I couldn't find a source on George W. Bush violating the same law and invite clarification, but I'd just like to say that I imagine that we can manage equitable and reasonable enforcement of the law as a society. Not all laws are made equally, but some are pretty sensible.