By your own admission its not irrelevant, there are a small group of people who do care about that kind of thing on either side. For an indie dev, that matters. AAA studios can pretty much guarantee at least a few thousand sales, indie devs, especially the less established ones, have far less. For first timers, there'll be none at all.

The thing is though, appealing to the pro-AI crowd is much more difficult. They want a game thats a shining example of what AI can be in gaming. The anti-AI crowd doesn't need that, they've got examples of that for decades. A few AI generated voice lines won't do much to appeal to the pro-AI crowd.

Nobody is trying to appeal to "pro-AI crowd" (whatever the fuck that even means).

If an indie (or even less of an indie) is using AI generation, they are doing so to save costs or work around their very limited budget. Or using it to work around some limitations where voicecasting every line would be infeasible, etc.

And losing the small portion of the miniscule-vocal-always-complaining crowd (who odds are - wasnt part of their audience to begin with), is not a loss at all.

Data on Steam is telling, these tools are becoming increasingly prevalent.