I mean, it's not an either/or proposition. People in the past could be mentally unhealthy, and people right now could be neurotic and over-medicated. That's been a debate for as long as I have been studying psychology and mental health (going on 20 years now).I thought we were referencing how neurotic and over-medicated modern Western society has become.
The question isn't "Who was more healthier?" but "how can we be healthy nowadays based on both past and current knowledge?" I still utilize learned strategies from Marcus Aurelius, as well as Dialectical Behavioral Therapy techniques by Marsha Linehan.
If we constantly look back and sigh and go "Oh, that was so much better" we learn two things: jack and shit. It requires patience, discipline and balance to actually learn rather than stare at the present and think the past was better.