It is worry some for sure, but scientists are definitely trying to find ways to do drug development differently because the current method is just too slow and cost intensive.
She talks about stem cells but the point is to develop a better way to screen drugs with the concept of personalized medicine in mind. There are a lot of drugs out there... few that are compatible for absolutely everyone but potentially many for a group of individuals with a certain genetic make up.
There are a lot of ways to find new drugs. One of them is to engineer a single domain antibody for a specific pathogen (sniper strategy). Another way, more of a shotgun strategy, is to look for plant or fungal secondary metabolites that can kill/inhibit the pathogen but is not toxic for different genetic groups.
So it looks bleak but I think that scientists will pull through in time. Just keep funding science!!! It's important for our future.