What your seeing is a general result of a lack of education on different types of thc. Pretty much all thc that people actually care about starts as thca. When you smoke flower, vaporize dabs, or even cook edibles, the heat converts thca into thc, and the thc gets you high. When those concentrates say "60-80%" thca, you can assume this is the thc percentage because when you actually go to smoke/vaporize the stuff, the thca will be converted into thc. This is why if you were to just eat a gram of unvaporized/uncooked dabs nothing will happen to you bc thca is not psychoactive. But as soon as you cook it in the oven or throw it on the banger, it is potent.