What's wrong with requesting information on competitors? What issue is this stuff being out in the open? If its hidden on the other hand, how do you enforce f

What's wrong with requesting information on competitors? What issue is this stuff being out in the open? If its hidden on the other hand, how do you enforce financing limits, hold people to account for inaccurate advertising, check that Russia isn't trying to influence your election. And looking at it from the other side, if you don't want people to know you're funding political adverts, why not?