well, first of all sonarqube makes you to write your unit tests, in my opinion this is so valuable for new/immature projects cause its overlooked most of the time(urgent new features 😄 ), all the other measurements (code smells, cognitive complexity, duplication) are simply an indicator for readability of the project.
Your developer team might be doing excellent work, and you can unburden them with unimportant stuff for the team since all the thresholds are adjustable, however, it gets more and more challenging to keep the standards high when new people are involved in.