I often use a text editor, NEVER a "code editor."
As is clear from the [About Geany](https://www.geany.org/manual/current/index.html#about-geany) section in the manual, Geany is a code editor, so its not suitable for your use-case. Trying to make the wrong tool fit your use-case is an exercise in frustration.
But as I said its unacceptable to rant at people just because their use-case is not your use-case. That way nobody will be interested in helping you, certainly I am not going to continue the conversation.
As a general comment to all readers, as I said above, Geany is built by volunteer contributors, if someone contributes a PR with additional functionality it can be added, but there is nobody who can be directed to make Geany do anything specific. That this issue has been open for 6+ years without a PR being accepted shows that neither the regular contributors nor anybody else has felt the need for the change of default keybindings.