That's fairly high, especially for someone just getting their career started.
And if she's very successful as an entrepreneur, running a business doesn't mean you have to pay yourself some inane personal salary, especially not if you'd owe 10% of it to an investor, so if her company becomes wildly successful but she only collects some salary of 100-120k and equity which is perfectly livable at only 90% after taxes, she could still walk away with an enormous amount afterwards, yet the investor would have a significant loss.
I don't see how any investor would prefer this over equity, it seems like a guaranteed loss?