@NessIllustration Yes! Exactly. @Nyrryl-Cadiz and @Nathalie-Kranich said it. Many of the authors I work with haven't done much research about the children's book market, if any. They don't know how the industry works, don't read current books in their genre, don't know popular children's book authors, and some haven't heard of SCBWI. They go to Facebook and YouTube to learn and are told that writing and publishing children's books is easy. They go to Fiverr and similar freelance services marketplaces to hire affordable illustrators. Programs like Canva and platforms like KDP make it easy for virtual DIY publishing. So it's no surprise when they don't know anything about the submission process for traditional publishing.
This isn't every author I work with. Some are very knowledgeable. I don't want to stereotype anyone, but many self-publishers fit the above pattern.