Because every person has different thoughts within their heart, although their characters can be generally surmised.
But even for Violet, she might not necessarily be able to hold all the thoughts of everyone in her own hands.
That is a completely unrealistic and absolutely impossible matter.
To want to control what others are thinking within their hearts, as long as controlling their thoughts.
To begin with, possessing such an idea itself denotes error.
What people can do is to influence others through their own actions, thus developing their own views on certain matters.
The end results may be expected, or they may exceed expectations.
Both are possibilities, so the more situations like these happen, or the more actions one takes.
The more likely they will be criticized or envied by others.
This is an unchangeable fact that will not change in any way.
No matter if a person's actions are good or downright bad.