I work in this field. It’s more or less correct but kind of lacking in detail. Cancer is a property of all multicellular life. I think it’s best understood as the behavior of a dynamical system that loses the feedback control that keeps cell growth under control.

Check out this paper from the Lander lab: https://elifesciences.org/articles/61026

It’s a bit jargon heavy but it’s a nice case study in how tumor growth is controlled through all the same mechanisms that normal tissue growth uses. Even cells with an outright cancerous gene mutation are basically still just doing normal growth and development.

I am guessing: There is an evolutionary "shadow". Genes for getting old and healthy are not selected for, because you get old after having children. Evolution optimizes for the survival of your children.

Might be that cancer hits after creating offspring.