https://www.youtube.com/watch?v=3-WX...youtu.be&t=370

Take a look at this. They're not going to ban you for parsers or other third party programs (like ReShade or whatever) as long as you use them responsibly. For parsers that means don't harass people. Yes, formally the answer is "no third party programs allowed" but as the video shows, they don't mind turning a blind eye to certain things.

To the original question, FFLogs only records what people upload. People aren't so likely to upload parses if they don't look good in them.