Quoting TheNuge:" Why would you discourage her from doing something that will give her more options? Of course, guide ... [snip!] ... Of course, guide her to degrees "that pay," but why discourage academic achievement when she is so young and impressionable?"
Oh, I want to be clear, I'll only discourage her if she doesn't know what she's interested in and has no career goal in mind. I took this path myself and I feel it was a very poor choice.
Perhaps a better way of putting it would be that I will encourage her to take some time off after high school to work and consider her options. I wouldn't want to discourage academic achievement... I would want to discourage going into debt unless she would be able to pay it back someday.
Of course, in the end, I would support her in whatever she chooses. I mean, if she has a goal in mind of course I would encourage her to pursue it.
Hope this makes sense? Maybe it's unfair of me. Given my experience, it feels realistic.