Yes, unfortunately true.
I really don't understand where you're coming from. I'm assuming you are probably biased considering that you are developing a visual novel yourself, so I'll try to keep it in mind, but have you played any of the several side-scroller/platformer games on here? From what I can tell with my experience with them, they only focus on the gameplay features until they aren't buggy (come and go, honestly) or they are happy with their results, then they focus on the sexual content. A percentage of the games don't even have the ability to jump (not criticizing, just emphasizing), yet are fantastic in terms of their sexual content.
I do realize that most devs start Patreons, and I was well aware that it was due to the reasons you listed. I still don't believe that it's an issue, though, as I believe hobby devs will NEVER have deadlines, except those they set for themselves. I understand very well that a consistent schedule is required, but only to those who rely on the income received from the game, which would imply (to me at least) that they do not have a job apart from game development, or that if they do, it's not one that requires all of their time.