I spoke with the author, the author disagrees with you.
The reason he consider that stealing is because they took that image from the online shop where the disclaimer specifically states "2022 © Magnetic Press LLC by Arenathemes. All Rights Reserved" without even trying to contact the copyright holder.
https://store.magnetic-press.com/products/viewpoint-by-lrnz
> But when I publicly put my code out there, I was also giving people the opportunity to learn from my code and reproduce similar things to it as well.
Not really, IMO
I can enter a bookshop and look around, open a book, read some pages and maybe learn something.
It doesn't give me the right to republish a similar book putting together what I saw, unless the license specifically grants me that right or I obtained a license that does.
Code Pilot is a commercial product, free licenses don't automatically grant the right to commercial use of that code.