I'm not judging -- I didn't attach moral value to anything I said. I'm genuinely curious about what happens in the brain to make a person susceptible to anxiety. If we knew that under-stimulation was contributory, then that suggest ways to treat the problem.
Maybe anxiety could be much reduced with drugs (stimulants) or maybe could be reduced with behaviour strategies that are all about taking risks and reinforcing the learning of how to cope with small risks and learning that they don't need to be worried about. Presumably human brains are adapted to deal with lots of stress (running from scimitar cats, not having a clue where our next meal will come from); so if we make our environments too safe then our brains are prone to start inventing problems.