I read it as a question, because of the question mark, not a statement/argument. If one extreme (high salt) is bad, is the other extreme (no salt) also bad? I

I read it as a question, because of the question mark, not a statement/argument. If one extreme (high salt) is bad, is the other extreme (no salt) also bad? I suppose it could be an argument but the way I read it was that they were unsure and would like to know more.