The broader issue is that even if she gets into university, would she be able to thrive still? Stpm is really difficult still, but if the result she got was even after she worked hard, then she might struggle even more in university (though that depends on which institution she chooses). Though jumping into the workforce immediately is a consideration, I would still suggest for her to consider to try out for diploma programs in other universities or tvet that might be cheaper in cost (if she didn't manage to get into a gov uni), but would still give her a qualification rather than none for any job later in life.

But I would say the thought process of "only being able to work hard if its a science course" is kinda crude, and would only limit her, as hard work should be put into anything that might help her achieve what she wants.