Exactly. Not all galaxies have the same % of dark matter.In fact some have none.[1] Maybe those with little to none, formed by random fluctuations, while others

Exactly. Not all galaxies have the same % of dark matter.In fact some have none.[1] Maybe those with little to none, formed by random fluctuations, while others formed because of the attraction to dark matter in their vicinity. https://www.smithsonianmag.com/smart-news/galaxy-without-dark-matter-shakes-astronomy-180968628/ https://www.smithsonianmag.com/smart-news/galaxy-without-dar...