Don't think its writers block to many Devs pull this crap. Honestly I think it almost has more issues with scripting or just have a premise in mind and no idea how to do a middle and the end.
Seeing the lot of them also restart the whole thing as well while barely making any story progress. I's just the initial Fantasy but not the rest of it.
But do think if you gonna make a VN, make a story board of sorts plan things ahead. And if there is any community choice to be had focus on locations more than characters. Seeing fan favorites always gets chosen while other characters get ignored.
Also not true, you can have an idea of where you're going and an ending but you gotta leave space in story for ideas you didn't think of yet. You evolve as creator too.
There is no block, or you didn't have any talent in the first place. He clearly did.
The truth is, making a game alone at this quality is tough personally and time-consuming with very little return for a long time, if not forever. Not everyone can endure it, afford it and admit it.