Those headphones only block constant background noise, not conversations. In order to do that you have to put your hearing at risk with enough actual noise to overwhelm the rest.
I have tried some decent quality ones. They don't block out conversations completely, but it does sound a lot quieter. They are definitely an improvement over not wearing them.
Yep.. my Bose QC35's are amazing!
I tried this, and my problem was that I would end up with "listening fatigue" or whatever you want to call it after 6 hours of listening every day.
I think he meant "conversations" as in someone walking up and interrupting you to have a conversation