This simply cannot be true... I personally used to be close to rank 5000 not long ago. I was stuck there, and I needed to improve some skills before I could get any further. I practiced hard, and finally I felt myself playing better again. Within a couple weeks I was just above 2000. That's not a bubble... I don't have a lot of maps in my Osu! list. I only have something like 600 S scores. I've simply gotten good rankings in a lot of the maps that I have. I never felt like I needed to high rank more maps to get PP. I've always gotten a ton of PP for every individual high rank on just the few maps I have. In fact, I wouldn't be surprised if ranking more maps somehow degrades your PP gain. My point is that if I can grow 3000 ranks in about a couple weeks, then anyone can do it. If you're stuck somewhere, then it's not the pros faults for shooting you down. You're just not getting any better.
Also, I have to comment on Sette. I had never really seen this guy play, so I wanted to see how average he really was, because everyone said his rank wasn't indicative of his skill. I went and spectated him for an hour, and I can tell you that I saw him do some amazing things... I don't know every map by name, but I saw him DT HD some really crazy hard insane maps. I personally couldn't touch how well he was playing these maps. I saw him DT HD SS this map that I could barely follow. So I don't know if that was his awesome insane map day, or something, but I don't think I saw him play one hard in that entire time.