So you are saying that if this book were sold as a print product, a PDF and a Beyond product it would be harder to find?If stuff is released on multiple channels, it is unlikely all of it is released in all channels, so, to have it all, you'd have to access every channel.
This is like saying it is easy for me to save a physical copy of a book I bought on Audible by setting up a tape recorder next to my computer while it plays. It's silly.As for the first part, copy and past or print screen or whatever. Then you own it. It isn't ideal, but if that is your main concern, it is not hard to overcome at all.