[astrange]

Please don't reply with platitudes. If your coworker is sexually harassing you then your coworker is the person the HR department is protecting the company from. Not you. You won't make it in the middle class if you can't navigate basic politics like that.

If you have an issue with payroll I hope you don't avoid getting it fixed either, because that's HR.

[I-M-S]

I think you might be mixing up how things are supposed to work with how they work in practice. I've seen HR from the inside - while I accept that my experience was just one data point, it made me personally actively avoid workplaces that have an HR department. YMMV, of course.