These people obviously have never bought a house with a mortgage. That's the way payment systems work. If you can buy a house outright for cash you can buy it for the listing price but if you have to get a mortgage it's going to cost you two or three times as much or even more more. The same is true of purchasing a car on payments You always are going to pay more. The name for that isn't 'scam' or 'lies' it's 'life'.
Brother, if you're paying three times the worth of your house, then you need to speak to a financial advisor asap.
Set that aside, you're paying off YOUR house or YOUR car. End of the day, its yours (technically the lenders until its paid off)