Making Ian appear in front of the error from the start would make it too obvious and would kill the joke. The player needs to experience a genuine "WTF" reaction.
I understand and knew it would eliminate a lot of the impact/surrealism when making the comment. But this also isn't a AAA title from a known developer so has less power to coast on + it's more amusing to people who've played the alphas/betas and have gotten accustomed to hitting "ignore" and "rollback" as real errors have popped up for all of us. We all thought it was an error the first time, hit ignore or rollback since we're used to the errors, then immediately figured out this was a surreal in-joke. Many users won't. Basically more trouble than it's worth IMO, assuming there ever is a steam release. And I think it'll still confuse a much greater % of its users than the Batman game bit.
As for that specific solution, I was just throwing out the first suggestion that came to mind. Many ways to handle it. Could be just the error screen as is now, but replace the "cannot access menu message" with another hint if the user tries to go there first, maybe a voice out of nowhere like "Saving? Loading? That's the power of god in a way, isn't it? I wouldn't mess with such forces while inebriated, Ian". Anything, really. Just throwing ideas off the top of my head. Point is, some more immediate hint is needed if the game moves beyond Patreon, for both practical reasons and with the power of hastily written reviews in mind. Gamers, especially porn gamers, aren't always the reflective sort. I think it's a great sequence, but maybe more appropriate as-is as sort of an easter-egg for those of us who've played through development.
Again, I personally think it's great and prefer it as-is, as far as personal enjoyment is concerned. Just thinking about the marketing/feedback "muh game iz broaks" headaches from a successful sales standpoint.