I know you like to try and catch all your ideas. I used to too. At work in the amazon warehouse many ideas came to me. and I would run around like a crazy person trying to find a pen and paper to write them down. then at home after a while I ended up having a stack of these ideas. then two stacks and three. then I went for yoga teacher training and learned about aparigraha and wanted to become detached and the feeling I get when an idea comes feels very attached so I wanted to get rid of my stacks of ideas. so I got rid of most of them and kept a few. But now I'm thinking, why do I need to capture every idea? because I'm not the source of them. The source is endless! and if the source wanted me to have an idea at a certain point in time, it would send one, right? so maybe that's how I can remain detached while also being open to receiving ideas. But then again I have nothing to show for any of this yet, while you have much to show for your methods of capturi
 ng all possible ideas. So maybe I shouldn't have gotten rid of my stacks of ideas. Oh well. The past is the past.
you're right that there are infinite. but the reason i think you need to write them down is because they mostly probably will not come to you at your moment of deliberate songwriting. When you go to work on songwriting, on purpose, and you need ideas, ..... the ideas might not want to come, because they feel they are being watched. Ideas seem to come more readily when you are not expecting. that's why i think it's important to write these down, because this might be your main best source of ideas. Then, the songwriting department just has to learn how to work with ideas that are handed to them, from the list. then there's whole other department called the selecting department, but that's another story entirely