That person might just be a regular Java developer who works on a project which onboarded Checkstyle, and can't disable it's MagicNumber check.
https://checkstyle.sourceforge.io/checks/coding/magicnumber....
https://checkstyle.sourceforge.io/checks/coding/magicnumber....
Larger problem than magic numbers ever could be.
var secondsPerWeek = Math.pow(2, SEVEN) * Math.pow(THREE, THREE) * Math.pow(FIVE, 2) * SEVEN