Obviously you do you and you do not owe anyone anything (least of all your employer).
However, something does not sit well with me about the fact that we’ve created a system where the most driven and ambitious people are removed from the production process as quickly as possible.
I'm probably a freak, but I can't stand working on something complex, being pulled away from it for a week or two, and not being able to pick things back up because it's not documented well. Especially when I'm the only person to blame.
I also make scripts and programs with the goal to hand them off when I'm done. I've got more than enough to keep me busy at work without having to be the only person able to support my projects forevermore. Ultimately I'm still the go to, but I never want to be so critical that I can't take time off, or that I'm effectively on call 24/7. I want the credit, but the whole point is to reduce responsibility by making shit more efficient and easy.
This has been my only experience as well. Some company I have to work with uses it so I have to use it for their stuff for some reason, unless I can force them to do anything else.