Do you own a smart phone? Do you have coverage? Do you have internet, TV. Do you pay copiously for any of those things and for something completely unnecessary that does next to nothing for you, or most people, ultimately.
R&D costs on new drugs are off the charts. Its extremely expensive to develop something like this in short order with the world clamoring for it faster faster faster. Its extremely expensive to scale out production to reasonable levels once everything has been validated, tested endlessly etc.
But the last cost, and I know you didn't even think of this for a second is that being first out with a Vaccine or treatment for a completely unknown condition, there are immense liabilities and prohibitive costs with this. If the treatments, vaccine, for Covid-19 ends up harming patients it means lawsuits, it means class action suits. Yeah I know you'll be hating pharma even more then..
Everything is built into the price due to the immense costs and liability involved. yeah but I know you want your treatment free with a Big Mac and it should fall out of the sky like manna from heaven.
Costs WILL go down as manufacturing is streamed to bigger scale, as there are more guaranteed buyers, as there is competition, and as there are more knowns about how the medication is performing, side effects, risks etc. Ideally pharma would want to test and run trials for a much longer period of time. This is not an ideal situation, far from it. Exorbitant initial price points serve the purpose as well of there being a shortlist of initial users, and thus less of a class action suit if disaster occurs on first batches rolled out.