Browser integration is a completely basic feature I expect from any password manager. It is absolutely useless for most people without it.
In fact not having it encourages copy and paste which reduces security.
Whats next? Strip javascript support from browsers to reduce the attack surface?
I don't get how this is even a discussion. Either he is paid by canonical to be a corporate saboteur or he is completely insane.
FWIW, I've used KeePass for years and have never used its browser integration...