Only kind of pointless. A few reasons come to mind. For one, they're games. (I say as an avid lifelong gamer.) For another, it's indulging nostalgia. (I say as an indulger.) To be clear, I think both things are fine, but of course to all things moderation, even moderation. When trying to rank things by pointlessness, many specific forms of entertainment and nostalgia are higher up than other activities or categories. Not as high as watching paint dry. And the more general category of, say, "having fun" is lower; some might even claim that to be the least pointless thing of all. I'd caution with "Amusing Ourselves to Death".
More reasons come from trying to predict where AIs and our interactions with them will be in 6 months, 1 year, 2 years, 5 years. Will we even be alive? Other reasons from wondering about alternative actions: is asking the magic box to do this particular thing, rather than some other particular thing, the thing that will actually bring you (or others) joy right now? Or money? Satisfaction? Fame? Upvotes? Some other things you want to feel or experience or do? (And in the OP's case, I think there's actually quite a good case of actions matching motivations, given the full history, and especially as earlier pre-AI-tooling ports were well-received enough to get a couple million downloads. Still, what about something new?) For my own small efforts this week, the main things I got out of it, besides the nostalgia (which is quite valuable to me), were similar to what I've been getting out of any AI-using projects this year, which is a strange mix of satisfaction, a bit of fun, a bit more awe at these magic boxes (even the dumber ones like Opus and Sonnet), anticipation of showing/telling a few people in person about this particular kind of pointless adventure, and a bit more melancholy about a few things, like the makeup of some of my online hangouts, or that my programming skills have been rapidly decreasing in their having a point to exist, or that my revealed preferences in this case are that I'm happier to let the AI do all the coding for this project and barely look at the code myself (there's a bit of disgust/gross feelings here too). I last thought of doing this work in 2019/2020, never got very far, now it's suddenly done, and even more than I thought of doing. (I still keep the AI out of some other projects, as programming the old fashioned way is in general still pretty fun to me at least.) Now it's on to the next project, when I decide that will be more fun than playing a game (I have such a backlog after all), and I'm sure it'll also be relatively pointless. More the honor to people doing bigger things impacting the world, with or without these tools.
This whole comment is also kind of pointless, I'd rank it as probably more so than the other mentioned things (except I guess watching paint dry), and yet it's here.