Nope, plenty of people do it faster with less people and less to no money. Especially the Japs, ever been to DLsite? Yes, 70% is RPGmaker stuff (but doesn't mean the galleries and porny content are bad), sure, its often a bit lower in quality (depending on artist), and shorter (well not really if you exclude the grind THIS shit game has), but hey, it costs pennies and ITS COMPLETE (in less than half a fucking decade and without crowdfunding too!)... Most the patreon shit is just pure money milking, plain and simple, either intentionally, or through sheer incompetence. Sometimes both.