I cannot help but be deeply unsettled by the proposal. Isn't that considering willfull ignorance of the world at large considered good mental health then? That is effectively an implication of saying we should reject all mass media.

Really mental health should be considered to have at least two components - 'morale' related to functioning and happiness and 'attunement to reality' based upon perceiving the world as close to as it is as possible essentially. That approach sounds like something which would boost the first at the cost of the second.