How is it unethical for her to charge what she thinks she is worth??
It's not really about what "she" thinks she is worth...it's about delivering a service to the customer that is worth what they are paying for. The catch is we never really know at the time of the reading if it is really worth the price it or not, we just pay the rate on "faith" that it will be worth it. But in the end, it's the customer who decides what it is worth.
Accuracy might be worth paying more for...but sometimes we can't even verify accuracy. After all we are calling to find out something we don't already know...it can take years to find out if a reader was accurate or not. In the meantime the caller can only put "faith" in the reading...or else dismiss it as "worthless"...and most of the time we don't want to think we just wasted our money so we have more incentive to put faith in it.
Most highly paid professions require some sort of "evidence" that their fee will be worth paying for...such as credentials or a work history or portfolio. They may have to go through rigorous testing or training or years of education. They may have to work their way up for years before they can become highly paid. They may have to be exceedingly careful about their reputation or provide very thorough references. They may have a lot of overhead in supplies or equipment or property. They may have several employees who depend on those high rates for their livelihood. They may have to be certified and or go through routine examinations or inspections, and they have to answer to someone if they screw up.
But a self-proclaimed, self-employed psychic has no one to answer to.* They can charge whatever they want, have minimal overhead and high profitability, and they can totally exploit the faith of the caller, offer no guarantees or refunds and then totally dismiss the customer if they screw up. There is no accountability.
It is sketchy to ask a high rate for a service when there is no evidence provided to the customer that it will be worth paying for. Pretty much all we can go by is taking the reader at their word, according to how they advertise themselves...and relying on testimonials and feedback and word of mouth from other callers...
And unfortunately, on the internet, word of mouth is pretty hard to substantiate...and it's quite possible for readers to create fake feedback or promote themselves under false pretenses.
*There is one thing we all have to answer to though, that is karma.