I feel ad proxying and server side rendering would be a better fit for the brand identity you are trying to create. Why does one need javascript to serve some t

I feel ad proxying and server side rendering would be a better fit for the brand identity you are trying to create. Why does one need javascript to serve some text or image, along side some content? One of the common reasons for blocking ads is they slowdown websites by using more resources and thus also reduce battery life. It also introduces another barrier to trust you more - how do I know that the Javascript code is not doing something unwanted (like browser fingerprinting, introducing some annoying animation etc.) - after all, it would be a pain to keep reviewing your javascript code and would be easier to just block it.