He clearly states that for him, abandoning Linux is ‘not possible right now’. Which makes sense, because GNU/Linux has been the free user-friendly alternative. What else do people expect him to do? Jump ship to BSD or GNU/Hurd and expect his entire workflow to work perfectly on day one? Start painting using pencil and paper, completely changing the nature of his work from day to day?
Moreover, if Linux, Ubuntu, or Debian (I’m not quite up to date on that) have accepted AI contributions, it’s because their maintainers have decided to accept them. It’s not like David has been vibecoding his tools to replace human-made software; he just can’t be expected to flawlessly work around everyone else who decides to do that. Contrasting him exercising control over his own work to stifle AI and choosing to (at least temporarily) tolerate others not doing the same with theirs (that he in turn makes use of) as some kind of hypocrisy is in extremely bad taste.