First, you can do your job but not be overzealous.
Second, it is not because you are not "doing more" for your employer that you miss opportunities to learn skills. You can do that for yourself on your personal time to your own benefit.
In addition, with what you wrote, it didn't look that like that you were suggesting to learn skills: You said to document what you already know, "transfer" your knowledge, so that it is easier for others in the company to live without you (or get ride of you).
First, you can do your job but not be overzealous.
Second, it is not because you are not "doing more" for your employer that you miss opportunities to learn skills. You can do that for yourself on your personal time to your own benefit.
In addition, with what you wrote, it didn't look that like that you were suggesting to learn skills: You said to document what you already know, "transfer" your knowledge, so that it is easier for others in the company to live without you (or get ride of you).