What’s the goal of being Buddhist after all human become Buddha?
Illumination of a man
What is the goal of being Buddhist after all human become Buddhas?
I’m not sure I understand your question. Obviously, you could say the same of all religions: what’s the goal of being a Christian after the Rapture and all Christians are in paradise? What is the point of being a Realian after the UFOs came back to Earth and brought all the Raelians to their planet?
I actually changed your question a bit because I think it made more sense this way.
So, I’ll try to answer your question even if I don’t understand it completely. The question I will answer is the following:
What will we do after all human become Buddhas?
First, I don’t see this happening in any near future. According to Buddhism, the Buddhas do not date from the historical Buddha but from thousands of years prior to him. So I think it is safe to assume that before all human become Buddhas, many more eons will pass, unless we, as a species, will have a massive shift of perception and many of us attain enlightenment at the same time, creating a massive chain reaction that would speed-up things a lot.
Even if this happens, Buddhism is not only for human beings but for all sentient beings.
In Japanese Buddhism, all beings (including plant life and even inanimate objects or entities considered “spiritual” or “metaphysical” by conventional Western thought) are or may be considered sentient beings.
This means that we are not quit ready to be celebrate.
“What is the point then?” You may ask.
I’ll refer you to an story I heard.
One morning, a man on vacation in Mexico took a leisurely stroll on the beach. He noticed that hundreds of sea stars had been left on the beach by the tide. He thought it was a waste but continued his stroll. After a little while, he happened upon an old man who was throwing some sea stars back in the sea.
He went to the old man and asked him: “Why are you doing this? There are so many, you can not save them all! What you do is of no importance!”
The old man said:” It is important for this one.” As he threw another one in the sea.
So, as you can understand, the more people the Buddhas and Bodhisattvas save, the better for all of us. The more there will be to help the rest.
Each sentient being enlightened is one less to “save”.