hi.
I'm an artist, musician, composer, writer/author, and much more. For all my skills, there is always someone demanding attention for how to do their own, or even for me to make them something.
I have worked with my brother before on collabs, and to say collabs no matter economics is fun, is an understatement. But I trust my brother, I know him enough to know he's not going to jip me on a publication or future payment promises.
I have also sought artists of higher calibers for my writings, and well, even with payments, and money involved, working with strangers is highly indeterministic. A complete stranger is more likely to take your money and walk away then someone you know in person.
Ya writing is a skill, so is art, and I have worked on both since a young age. I put in the time for both to get to the point I'm at now. I feel that others take these skills for granted, never fully appreciating the hours of content created that isn't pleasing to the artist/writer.
I do want to collaborate in the future with an author, but I would much rather prefer I meet them in person, and work closely with them in my home town where I know I can find them and not be afraid they are just some liar pretending something on the internet.
There is always some young person with dreams of making a comic or graphic novel or story book or a novel. Great, we should encourage them to fulfill that dream. I don't think we should be upset they are trying to find a partnership that works for them. But we also need to make things painfully clear, on subjects of time as you have mentioned, and economics involved.
My current wip is an 11 year old manuscript I have only recently began to make the art for. I spent those 11 years creating pieces of art, most of which I do not own anymore, lost to trash and so on.
I think the biggest problem facing anyone, is the fear of failure, the fear of never reaching a goal. Those fears can cause us to panic and rush things, and make work of low quality. Some of my best works, took weeks, months or years to complete. Often times I would just spend forever trying to invision a story or subject or background, and finally find a working reference or have some inspirational dream or experience to base a work on.
So I dont think we should chastise these authors, but be honest about how demanding their work(s) will be.
And I totally agree that these authors should begin practicing art for their works.
I often get at a point where I believe my decisions in creative venues are final, that it will be that way for all my life. but as my mother pointed out, I have my entire life to perfect my works and make them as I want the world to be able to enjoy.