It's not anger.
I just found your comment presumptuous, even if you meant it in the third person. Calling it out as such doesn't mean I'm "seeking anger".
People are different. No one, myself or anonymous third-persons, needs to "grow" because they have different tolerances than you.
It's a general statement that the only way to grow is to seek discomfort. Your position as I understand it is that different people have different comfort levels with spontaneity . My position is that I understand that and see it as a blocker to socialization.
The core issue with scheduling life within your comfort zone is that it is inherently reductive, because you cannot plan out your relationships.
The most important things in your life will happen out of schedule.
So I get that you are more comfortable living according to a schedule. All growth comes from embracing discomfort.
Yes I'm presuming that I'm right about this fact of life.