I believe there are several reasons. However, they all go to the point that the Dev has LIED (How long has he promised to get assistance!) on more than one occasion. Second, that these LIES indicate there is long term concern for the completion of the VN.
GingerSweetGirl has addressed this quite well indicating that this is a unique product and is tops in its genre. Yet, the Devs inability to produce in a timely manner nearly guarantees its failure and future abandonment. For those that enjoy the VN this is very concerning. And yes, there are some that take it too far just like there are those apologizing for the Dev that take it too far. If you are confident you will still be here in 28 years and that is an acceptable time frame for completion then bravo for you (and your children). Us deplorables that do not believe this will be long gone anyway.