The top rate 12.3% only applies to income in excess of $600k for single and $1.2m for married. How is quoting this rate at all relevant for average people? htt

The top rate 12.3% only applies to income in excess of $600k for single and $1.2m for married. How is quoting this rate at all relevant for average people? https://www.ftb.ca.gov/forms/2020/2020-California-Tax-Rate-Schedules.pdf https://www.ftb.ca.gov/forms/2020/2020-California-Tax-Rate-S...