Both bill gates and Steve jobs think/thought biology + technology is the next revolution; why aren't more entrepreneurs building for it?

"Towards the end of Steve Jobs’s life, he told biographer Walter Issacson that the silver lining to come out of his illness was that his son, Reed, had become obsessed with cancer research, working with some of the best cancer researchers at Stanford’s oncology lab doing DNA sequencing. “His enthusiasm for it is exactly how I felt about computers when I was his age,” Jobs told Issacson. “I think the biggest innovations of the 21st century will be the intersection of biology and technology. A new era is beginning just like the digital one was when I was his age.”