Breech *may* indicate a problem with baby or you (anything out of the norm does), but I don't think it is common. My daughter was breech and there was nothing wrong with her or me and my next one was head down and I had a vbac after her. So no explanation for why, it just happened and she ran out of space (I joked she didn't have a sense of direction like her father). I know a few people with breech babies who have needed a caesarean and all babies have been fine and healthy, it is just riskier to deliver vaginally with them (due to damage to you and most importantly I was told, if their head gets stuck).
My caesarean was fairly straight forward and I recovered fairly quickly (preferred my vbac though), but at the time I just wanted what was safest. I did read that you could try getting on all fours or swimming to help gravity to allow bub's to turn. I tried it a little (not seriously), but no luck.