As described in https://tex.stackexchange.com/questions/702619/siunitx-keep-leading-zeroes-while-parse-numbers-true/, some people might want to retain a variable number of non-significant digits.
As described in https://tex.stackexchange.com/questions/702619/siunitx-keep-leading-zeroes-while-parse-numbers-true/, some people might want to retain a variable number of non-significant digits.