That's actually quite reasonable. Everyone knows that parents are actually more important to everyone, but many people have a firm goal in mind from the beginning, and I'm afraid there will be many changes in the process of slowly serving their parents. In this sentence, what he said is to tell the thoughts of many people and a more common situation.
In fact, many people will have a strange phenomenon, that is, when their parents were alive, they did not always accompany them to honor him and fully fulfill their filial piety for him. Instead, they organized funerals for their parents after their parents died. Such a thing is actually hard to imagine.
I haven't had a dutiful son in bed for a long time. I think everyone has heard the saying. In fact, what I want to express is that you can still show more sincerity and filial piety if you often accompany and serve your parents. Then such filial piety is actually very rare.
Therefore, such a sentence always reminds everyone that parents must be filial when they are alive, take good care of them, serve them well, and never be filial to them after they leave this world.