I think that is not a universal truth. I can speak for myself when I say for ME it is NOT true.
The NOT contacting on impulse, even though I knew a few nice words of my therapist would have helped me feel so much better, was what helped me to rely on myself and realize how much strength I actually have to manage some things on my own!
So I think what you are saying is true for some, but certainly not for everyone.
We people have SO much strength inside us, even the most broken ones among us. We really CAN help ourselves a lot of times.
I am not saying it is wrong to want some encouragement - God no! And it's not wrong for people to contact their therapists. But sometimes, it is so rewarding to have that impulse, not act on it, look in the mirror and pat ourselves on the shoulders and tell ourselves we can do this!