And it has. There is now a FDA approved device that can be used to treat people.
The government funds fundamental research because it believes that the public is better off with a device like this for sale than without one.
The government probably put some amounts of money, I'm guessing 100s of thousands, in grants to explore the technology. IT seemed promising so the commercial sector came along and invested 100s of millions. Crunchbase put the investment at 230 million in this case.
In addition to the sister comment (that I 100% agree with) that publicly funded research ought to be in the public domain, if the technique is broadly useful I’m sure that companies can find patentable optimizations to the equipment or protocol.
