Earlier quoted context omitted.
> Opill should not be used by those who have or have ever had breast cancer. Consumers who have any other form of cancer should ask a doctor before use. Opill also should not be used together with another hormonal birth control product such as another oral contraceptive tablet, a vaginal ring, a contraceptive patch, a contraceptive implant, a contraceptive injection or an IUD (intra-uterine device). you did not read…
> Consumers who have any other form of cancer should ask a doctor before use. I wonder why?
Yes, I also wonder why you'd take that to mean it caused cancer.
The thing you quoted doesn't indicate anything about it causing cancer. It says people with a certain medical condition shouldn't take it. Hormones can influence how fast certain cells get replicated, and it's important to not encourage cancer cells to replicate even more.