In your opinion, what makes someone weak? In my opinion it means you're not able to cope with anything.

I'll give you a boxing analogy, it's not the hard uppercuts that wears your opponents down, it's the continual jabs. Even the most strongest of people can be worn down over time by the little things. You and others may think a person's weak, but you and others do not know what they have been through in life. For example, my last factory job I could heft 100+ pounds of aluminum pieces onto a milling machine platform, but after two bouts of blood clots in my lungs, and being on assisted oxygen 24/7, I have trouble with a gallon of milk.