Depression is an altogether too complex subject to generalize a solution like that. The western way of life does foster situational depression, which your tips are very helpful with, but it's far from the only cause. I do agree that the overwhelming majority of those who suffer would be better off with some help in changing their style of life than the nowadays so easily prescribed medication, but don't discard the fact that for some, finding a cure is not as simple.

Makeshifts last the longest.