Because you can do so much more than just one thing

Your employers are used to your being good at the one thing you do.

They send you on training courses so that you can get even better at the one thing you do.

They can’t imagine that you might be capable of anything other than the one thing you do.

They don’t want you to do anything other than the one thing you do.

That one thing is what they want you for, what they need you for, what they pay you for.

It makes no sense to you.

You can do so much more than just one thing.