How would an optional, official parser be toxic?

[Maeka]

First, I appreciate your desire to see if there's a way to make this possible. However, what you've listed isn't actionable due to the player veto.

-The option to hide from the system means people will eventually be excluded from content merely for the act of hiding. Gms can't block this, simply because all it takes to veto this restriction is a silent, unexplained kick of the hidden player. Remove kick, and players would disband and reform without the hidden player. See where this is going? Hide yourself and you stigmatize yourself; you have something to hide.
-Gms are actually pretty wise to lean so heavily on playstyle differences, because that's exactly what happens so often. There's no sense in blocking someone from the game if oil and water didn't mix, but things were handled with the ingame tools like votekick or vote abandon. If GMs were to remove playstyle differences as a justification they could use, you would see the player veto manifest as a harassment report on the player that couldn't outdamage the healer because they were "obviously trolling, nobody can be that bad unless they try." "They turned our perfect run and they did it intentionally, ban pls"
-While we currently do not see numbers in pf, that doesn't mean even now people don't get mysteriously booted for no given reason because someone looked up their history online, or did a few runs and suddenly got kicked to the curb because they were doing half of the damage of a healer. Of the ones you listed, this one's probably the most vetoed on pf even now.

Furthermore, limiting any ingame tool through the terms of service only means more people will develop ESP, or find any hundred other ways to talk about things they're not talking about and sidestep any restrictions placed on the ingame tool: in effect this sidesteps any restrictions.

Of course, ask any of these players how they developed esp that gives them such precise information and they'd swear up and down they don't use third party utilities, because of course third party utilities aren't permitted.

These are the exact reasons why it must be personal-only WITHOUT any option to allow others to see your parses.

Yes, third-party parsers will still exist, but at least with an official personal-only parser, I could at least wail at dummies and experiment without breaking the ToS and/or satisfy my own curiosity/help myself perform better.