I think most folks assume that people in their twenties will just go without dental/vision/pharma in the US and grab a cheapo bronze tier plan off the ACA unless they have a preexisting condition that requires some regular treatment.
I agree that the costs are higher in the US and it makes dealing with stress more difficult but... the US is a terrible place to be if absolutely anything is wrong with you - so assuming you could take a pleasant sabbatical there seems unwise. It'd almost certainly be cheaper to move overseas and pay whatever monthly fee the local government charges to temporarily enroll on their healthcare and it sucks - but, again, it's the US where healthcare is a stressful burden yall have to deal with - I was born there and emigrated and I've been quite happy myself.
I agree that the costs are higher in the US and it makes dealing with stress more difficult but... the US is a terrible place to be if absolutely anything is wrong with you - so assuming you could take a pleasant sabbatical there seems unwise. It'd almost certainly be cheaper to move overseas and pay whatever monthly fee the local government charges to temporarily enroll on their healthcare and it sucks - but, again, it's the US where healthcare is a stressful burden yall have to deal with - I was born there and emigrated and I've been quite happy myself.