The Black Forest is much more than trees. The southwest corner of Germany hold many great places to visit. To the south is the Bodensee where Germany, Austria and Switzerland meet. To the east is Ulm with it's Muenster and Bread Museaum and the nearby small city of Blaubeurn where you can not avoid meeting the local people where they live and work.
Why not? Just because you don't agree with other peoples opinions, doesn't means that they can't express them. I like the Schwarzwald particularly the northern part. I've probably spent two and a half weeks in the area in the last ten years. If you think the BF is just Baden-Baden or Freiburg, I could understand not liking it.
I also enjoyed the Black Forest. We spent several days at a farmhouse in Sankt Peter with the German branch of my family. I found the countryside scenic. We also enjoyed stopping at the Bodensee as we drove to Bavaria on the next leg of our trip.
I also like the Black Forest. I also like the Odenwald (which I can see from my house). I also like the Pfälzerwald (which you can see from the Odenwald). I also like the Taunus, Harz, Thüringerwald, Rhön, Sauerland, Vogelsberg, Spessart, Schwäbische Alb etc. It's not so much that the Black Forest isn't interesting or scenic. It is, especially the southern portion around Freiburg. It's just that it's not particularly unique. Because the location is sort of isolated in the SW of Germany, if you visit the Schwarzwald from just about any other part of Germany, you've probably passed a very similar region on your way.
I can't add too much to the overall discussion, but one of the most memorable and serendipitous experiences I've ever had was in the north Black Forest village of Seebach. We were sitting on the balcony of our B&B, Pension Williams, on a clear and quiet Saturday evening. Just as six o'clock rolled around, the church bells from three or four churches up and down the valley started ringing the Angelus. It was amazing. Some were the deep bass tones with a slow ringing while lighter tones of other bells beat more quickly. Put together, it was an experience I would want to have again. I'm not sure how long it lasted, but it was over much too quickly, although it probably went on for at least 5 minutes. There might be other places where the same thing happens, but I heard it first - and most memorably - in the Black Forest.