When the world crumbles like a cookie

A monstrous wall of ice in the arctic circle.
Etched with the years of the tides and the world's history.
Similar enough to that of a persons life.
Although short lived, knowledge comes flooding in with every event in your life.
If you have a bad accident, you are careful next time you're in a similar situation, so as not to get hurt.
If you get lost on your way to a party, you learn your way next time you travel to the same location.
The ice shelf in the arctic has no choice to how it collapses like a paraplegic in therapy.
Crashing into the freezing pure water below it. Erupting waves and destroying life as we know it slowly.
We have choices as to how our life comes crashing down. Crumbles to pieces like a dry cookie in your clenched fist. The same fist that curls whenever you think of your anger. Your nails digging into your palm, ripping up the skin like it's a block of cheese.
Unfortunately, the mistakes that we make can be catastrophic. Some part of our life might seem blissful. The happiest era you've had in your personal cocoon. And other parts seem to diminish or alter drastically. Just like the world we live in.
Who's to say that everyone is happy? Who's to say that no one has any problems? Who's to say that one heart shouldn't hurt, one mind shouldn't sting and two eyes shouldn't bleed tears onto the shirt of someone who gives a damn?
Answer my riddle, and feel free to have my trust back. Rebuild my wall of ice and preserve the entity of friendship within my arctic circle.