Here's the second phrase of the Wikipedia page you sent : "Currently the adaptive advantage of sexual reproduction is widely regarded as a major unsolved problem in biology". Please don't say it's "bollocks" when it's clearly not clear, and stop with the passive-agressive statements. Now that we know that question of sissiparity is not solved ; the philosophical question can take place. About the whales and the other argument, I was referring to that kurzgesagt video on cancer and whales ; where they do posit the screening system argument and the other which was "more cells, more cancer, but cancerous cells can also get cancer" but now that the research has been made clear on that recently, I understand my lack of knowledge in the whale's cancer departement.