This is precisely what I was thinking at an initial read. However, I am not too sure that there are "100% certain" effective ways to cause cancer to produce. This method of creating cancer cells is much more efficient and in a controlled manor. Having this enormous power of creating cancer can be deadly for the weak minds as they will use it for evil than good. There is definitely a "good" that can come out of it as when there are abundant amount of resources to be tested with, the researchers will try every possible combination of alterations which will eventually find a way to suppress the cancer cells. Thus curing cancer forever (as optimistic as that sounds).