Bodhisattva is one of the first beliefs where Mahayana (East Asian) and Hinayana/Theravada (South/South East Asian) sects differed.
While precursors to Mahayana tradition held belief that anybody can achieve Buddhahood by becoming Bodhisattva, the conservative Theravada sects claim layman can only achieve the status of Arahat at most.
That's a populist belief marred by just world fallacy.
The end goal of Buddhism is to achieve Nirvana, which means no more Karma and no more continuous rebirth amd suffering whether they're "deserved" or not. It can be implied that continued rebirths are itself suffering. So the only peaceful path is to stop it somehow.
I've stopped being Buddhist a long time by now but I did discuss a lot of it's philosophy with some studied Buddhists and monks.
Also a lot of populist Buddhists are actually scared of Nirvana. They just want to be reborn into a nicer life than they have now.