You are right! There is no comfort in that as grief is very subjective and individual. And comparing what someone else felt has zero benefit as it’s never even close to that. “I know how you feel”. “No you don’t”.

Now if someone specifically wants your suggestion on how to deal with grief or asks you how you do certain things or if you have a specific resource to help with grief, then it’s entirely different story. Then it’s appropriate. Otherwise prying or comparing or expressing unwarranted opinions or giving unsolicited advice is making someone else’s grief all about yourself. It’s never ok.