Of course, first of all, there are many kinds of ceremonies, each of which implies that other forms are not as good as it. If you are not a believer, I'm afraid you don't know the complete procedure. If there is a grave, I'm afraid your mistake will have greater consequences than your inaction. Secondly, whether it is life or death, the meaning of life is only for relatives and friends or enemies. Filial piety is better than death, except acting. Finally, the key is your feelings for him/her. Only when there is love can there be respect, otherwise it is just acting. Whether acting is necessary depends on the audience.