KeePass is a community project, Bitwarden is not. These are just client applications that sync and interact with the .kbdx file the community has formalized a standard on. That's why Bitwarden has a unified client application ecosystem and KeePass does not.
You don't understand KeePass, which is fine, but please don't make bad assumptions like these if you don't understand the underlying reasons for why a thing is the way it is.
It's like calling out why there are two dozen email clients that speak IMAP.
You don't understand KeePass, which is fine, but please don't make bad assumptions like these if you don't understand the underlying reasons for why a thing is the way it is.
It's like calling out why there are two dozen email clients that speak IMAP.