Bose QC 35. I wish the noise cancellation was adjustable and better. I mean it is good. But I'm one of those people who actually wants to be encased in a cocoon

Bose QC 35. I wish the noise cancellation was adjustable and better. I mean it is good. But I'm one of those people who actually wants to be encased in a cocoon of total silence any time I choose. Some examples. Sitting outside in a noisy cafe, with NC and white noise playing: zero background noise. Same setup without a track playing, only NC: I can hear everything, but it's just quieter. Voices, cars still there. Not acceptable. The way I interpreted the promise of NC was it would actually play the inverse wave and cancel everything. I don't understand why some sound gets through. And I feel cheated. I don't think my expectation was unrealistic because it was based on the following episode. I was on a plane and the Qatari American guy next to me chatted to me about films. When our conversation died he started watching movies, with some huge black headphones. I asked him about them. And he told me they were NC and asked if I'd like to try. I put them on, then he pushed one button on the side and whsp! Every noise disappeared! The plane engine was gone. He kept talking but it was gone too. It was literally a religious moment for me. I glimpsed another world I didn't know existed. I never knew I could end all the noise. So naturally I had to get myself a pair. I asked what they were and he said Bose QC. They were from a few years ago. So you see I thought I'd found something I could trust. At Yodobashi Camera I was so excited to buy my QC 35. But when I used them, I could not rationalise away my disappointment. It was qualitatively different. On the plane those headphones had clearly put my ears in a pressurized bubble. Of total silence. But the QC 35 was just like God had turned the world volume down a third of the way. Really not good enough. So now I still wear them, but I'm always playing tracks. At least I've discovered Spotify. But I still think I'd much rather prefer, the Total Noise Cancellation my first experience promised. Now sometimes I even go back and question the trustworthiness the guy who introduced me to NC such is the magnitude of the difference between my expectation and the reality. Did that Qatari American guy trick me? Did he just start mouthing silently as soon as he pressed the NC button? Or did that NC tech really cut everything? And if the tech was legit, did Qatar or 2014 get better NC tech than Japan or 2017? Why has Bose foresaken me?