I need tabs that cannot be accidentally “overwritten” or closed. If anyone else needs this, I do it like this: For window names that contain a red x, the left click is disabled. This also applies to DT shortcuts that could change the contents of the window.
If a tab with an “x” is activated (for example an RTF doc), I can edit the text, but the tab itself is “blocked”. To switch to another tab or select another doc in this tab, I need to left click with fn down. You don’t do that by mistake. If I remove the “x” from the name, it’s a normal tab again. Adding or removing the “x” is of course also automated… I don’t know if this is understandable. 
Anyway, I do this with BTT but I assume this also works with Keyboard Maestro or similar software … in case anyone else needs this 