Translation:Why do you not use another program?
So UgleOwl13 was responding to Duolingo in context, as if the sentence, "why do you not use another program," was asking, "why do you use Duolingo and not another program"? UgleOwl13 responded to Duolingo, not to the sentence exercise, by saying they like the duck program. Duolingo's Danish course involves a lot of sentences chronicling the adventures of the duck and the bear. Essentially, they were saying they like Duolingo so they're going to keep using it, in response to the sentence. I followed suit, referencing many of the practice sentences contained in the Duolingo Danish course. There are sentences in the Danish course like, "bjørnen tager mands hjule og løber væk [the bear takes the man's wheel and runs away]," as well as sentences about the bear and the duck traveling to China, the duck eating red apples while the bear eats black strawberries, and the bear running with scissors (while children do not run with scissors). The duck and the bear have a very storied history and many exciting adventures, it seems. Does that make more sense now?