doctors choose their jobs too and they generally encourage people to stay out of the ER

That's completely irrelevant. Rescuers can encourage people to be safe, that's expected. they chose that job , despite it's dangers, because they care about those people being safe.

They know the danger and chose the job. That's the relevant bit.

I think you missed their point - just because you choose a job doesn’t mean people shouldn’t try to avoid needing to be rescued in the first place