but not once in your writing have I seen any acknowledgement that one should also be producing more with more resources available.
In what way tho? Better hardware? Isn't really doing anything for games created with AI as he's already operating on a 3090ti and upgrading wouldn't magically increase how fast he can type prompts or how fast he can come up with engaging ideas as to how he wants the story to continue or what he wants his scenes to look like. Better hardware wouldn't help him post-processing images via Photoshop etc. either. Would be a different story if he was on a 10 year old potato rig, but that's not the case.
Hiring people? Last time I checked, he was making roughly ~$2.000 a month on Patreon. He's gained some subs since then, so let's assume he's at $3.000 a month now.
That is before Patreon's cut and before taxes. What's left is barely enough to turn it into a full-time job, which is what he's apparently done now. Hiring people costs money, and with that kind of income not really feasible yet, atleast not if that is your only source of income.
He's already got people proofreading and playtesting I believe, and at a certain point I'd say hiring another artist would totally be an option, given that his income keeps going up.
Other than that, not quite sure how the amount of money he's currently earning would increase the development speed. That said, he is in no way obligated to change anything. Again, this would be a different story if for example, like other developers have done in the past, he'd promised to hire helpers upon reaching a certain sub goal or whatever. If he ever does that without delivering, then yeah, I'd be the first to come here and criticize it just like I do on other projects.
Hope that's enough input in regards to the resources available.
Cheers!