Can we prevent cancer by inducing apoptosis?

No. It is a. Characteristic of some cancers, lymphoma and small cell lung cancer, to forget how to apoptose, and treating them causes the tumor to dissolve reducing bulk. But it is usually only a characteristic and not the cause of the cancer: a sign that there is a cancer, and it is molecularly controlled, but there are other things also wrong.
Targeting. If you could selectively induce apoptosis in cancer cells, it would treat cancer, or prevent obvious cancer however, how to target cancer cells selectively has not been sorted out. There are many therapies that would be effective if we could selectively use those against cancer cells only while sparing the normal cells.