insects, predator animals, cuts+bacteria all seem like quite hard-to-avoid disease vectors. we can spread disease quickly these days, but there are no shortage of ancient diseases you could've come across in a small hunter-gatherer society

I believe the modern world creates a lot of mental health problems, loneliness, and unhappines, but it's absolutely physically safer and more survivable (and more comfortable) for a huge percentage of the developed world. (It creates those mental problems unnecessarily, given the level of technology we have, but deeply baked into our fairly-antisocial individualistic culture)