Is this the same thing as asking what is a conservative and why are they that way?
I am no expert and can only wander wondering and pondering from life experience and limited knowledge. Frankly, I think everyone have those two qualities that simply are resistance to change; attitude and outlook on life.
The first question most will ask with accepting change is what is the cost? Perhaps that may blind one to seeing the return of investment. What investments (Factors) are at stake?