I must say I don't agree with this analogy, mainly because the "wounding" you mention in weightlifting is a totally different biological process than wounding induced by microneedling, and those differences are relevant regarding the emergence of cancer.
When you lift weights, you are actually causing micro tears in your myofibrills. Basically, destroying you are destroying structures at a sub-cellular level, yo are not destroying muscle cells per se. The reaction of the body is to repair those myofibrills, and produce mor, so that the bundle of myofibrills become thicker within the same muscle cells. Bottom line, increasing muscle mass does not involve increasing muscle cells, but rather making those cells larger (thicker, actually). That can't be considered regeneration in the strict sense.
On the other hand, microneedling seems to induce the conventional regeneration processes, that is, tissues are damaged, and then tissue is regenerated in the form of producing NEW cells which are going to replace the previously destroyed ones. As someone else claimed before, this process involves the multiplication of cells, and cancer is basically cell proliferation.
I am not saying that needling definitely increases the risk of cancer (although if it does, it would not be hard to believe at all, see the studies posted by @Wergi) , Im just saying that the analogy with bodybuilding is not adequate.
