How would an optional, official parser be toxic?

[NessaWyvern]

However, if you could parse people in-game without the website, then I bet people could, and would, use the parsing tool to be jerks in content where you don't need parses, IE, leveling roulette etc.

That's why I mentioned "self-only parser". So you only see your own numbers. Atm you get jerks who blame others for bad dps when they're not using a parser anyway (when they themselves have bad dps) , so things won't change much. In fact some delusional jerks might have their own eyes opened if they could see their own dps. And like I said, there's still the report and blacklist function.