While I failed to make myself clear, I was suggesting the OP use a password manager to store important passwords, usernames, and even important attachments (where applicable). And a Pages document can do text, tax documents and even videos. Granted, it wouldn't be the ideal solution for a one size fits all but, it would make it a lot easier for the OP to access and amend as needed using one or both of both suggestions. I hope that clears your confusion. If not, I am not going to get into a debate over it.I'm confused...how does this help the OP?
Nowhere did the OP say he was using a password manager, nor did he say he was using a document. The OP created a password protected image file from a folder. It could have been a folder containing photos, videos, tax documents, a work project, etc. Can't put those in a Pages document.