Our current society is undoubtedly the least resilient it's ever been. This is because whatever we want to believe, we evolve in a much less stressful environment than our predecessors have.
We have also grown to strongly value protecting our children from any harm, physical, mental and emotional as a good thing to do as parents.
As such, children grow up to have very resistance and coping mechanisms to learn to handle difficult situations and believe that anxiety is a feeling to be avoided at all cost, favouring prevention over learning that being anxious is a normal phenomenon and that the more you are exposed to it, the less impact it has on us.
The damage that anxiety causes is when it becomes chronic and we have lost the ability to come out of it and replenish ourselves, usually whilst enjoying the positive outcomes that facing anxiety has resulted to. This state used to be mainly caused by intense experiences of stress and fear, but I believe that it is gradually experience by people who can't cope with any anxiety at all because they have never been gradually exposed to it.
It comes naturally to us to face anxiety. We seem to forget how physiologically anxious we must all have felt when we took our first steps. Some of us will remember the first time our parents let go of the handle of the bike, the first time we swam a length in the pool.
All this anxiety is natural, normal, and good for us. It is temporary and result in endorphins when we reach success as a result of having faced it. We are damaging our children when we constantly do everything to avoid them facing anxiety. Parents who do their kids homework because they are scared to tell the teacher they didn't know how to do it. Parents who get involved in dispute between kids because they don't want to be involved in confrontations, parents who lobby against exams because exams are stressful and kids shouldn't face that stress, the all concept of 'children should be children and enjoy whilst they can'.
The problem is that being a child is not so much a time to be free of all the difficult times adults face, but also and more importantly a time to gradually learn to face difficult times so that once they reach adulthood, many of those stressors will not be mountains to climb each day.
So I agree and disagree OP. I think that anxiety has been normalised as a mental disorder, when a lot of the anxiety people faces is anxiety that shouldn't cause them the trauma they are experiencing, but in a lot of cases, it is because of lack of exposure, and the effect of it is still debilitating.