There is an old maximum of leadership that is:

“If you want something done give it to your busiest person”

This is why I turned down promotions.

The next stage in personal growth is to help others grow more competent and learn to delegate. That means you can then focus on the stuff only you can do.

At least that's what I'm learning.

Or, as I like to refer to it, The Curse of Competence

That requires people who are willing/able to learn. I have put together so many documents detailing a procedure with clear instructions and screenshots and still have coworkers who can't figure it out. Hell, the number of people who can't run a goddamned script to do it for them ( also with instructions and pictures!!) is also too goddamned high!

Been there too. The advantage of writing the document though is that it means you can point people to it at least.

In my neighborhood, I’m the backup for the backup DIY guy, but people are starting to see where I specialize in, so eventually I will start getting jobs that the others can’t do as well. Soon I will be the specialist for certain things.

Yeah, but you and I both know you're still going to be holding their hand 30-40% of the time anyway...

That's called "doing management's job"

On the bright side being indispensable makes me impervious to layoffs.

Yes but, I just found out that I'm so competent and trustworthy that since management needs to shuffle the supervisors around and the only way to make it work is to leave me in charge of the team for several hours without a supervisor. So now I'm looking at "we'd love to promote you but you're just to valuable in your current role". It a damned of you do, damned if you don't situation.

Better than 100% at least, I guess.

I wish this was true

You may be able to leverage that for benefits like WFH days or higher raises than rest of team.

Same.
in my case I have soooo much documentation it overwhelms everyone. Every day it's always something new so it keeps growing.

Thats the nice part of hybrid. Min max time at office so more time to chill.

While it’s no guarantee, it’s true more sometimes than not

And it is terrible. If you perform this kind of delegation, you have to expect that the other tasks will be shoved back on the priority list and the overall efficiency will decrease. This busy person will need more time overall for the sum of the tasks, because this kind of parallelization will make it harder to work on one task with focus. Also they will burn out eventually. But hey, that's not management's problem.

I refer to this as "the curse of competence"

Yeah you just get to do the work of 3+ people as others get laid off and the workload shifted to you, until you can't actually manage to keep up and then either get laid off or quit...