Yes you are supposed to buy insurance (though many just take the penalty). Many Obamacare plans are pretty crappy with low max pay outs. It drives me crazy when people don't read the plans they are buying. My plan has a huge deductible (10k) but no max pay out. So basically I pay 100% for everything but if I ever need some serious hospital time I'd only be out 10k. (And it's very expensive).