A self-improvement tool is needed in this game, especially for end game

[Vahlnir]

Let's explore this a bit.

If your argument is:

A misused tool is more damaging than it is helpful. Toxic people will misuse tools. Therefore, toxic people misusing the tool will cause more damage than the tool can help people.

It's valid. If the premises are true, then yes, your conclusion is also true.

It is not, however, sound. You cannot prove the first premise, that a misused tool is more damaging than it is helpful.

My experiences from other games (WoW being the biggest one) tell me that the potential for abuse could be quite high. You're right, I don't know that for sure. But judging from what I've seen in the past? Yeah, I'd bet gil on it. People will be people. Always.