This is really another example of a claim of "genetic exceptionalism", that genetic information has a special status among other sorts of personal information, that mostly is not true. Your personal information, broadly, is informative about your relatives, your friends, etc. This includes your personal health information, your personal financial information, your online habits, etc. Any time you share personal data, you are disclosing information about people associated with you, without their consent, that might be used against them. And often these other classes of personal data are more informative than genetic information.