Hey, Bliss how ya doing? long time no rant.
Elon is a businessman, who is near the top of personal wealth in the world. People with that much money don't invest $44 billion on something that is guaranteed to lose revenue and never recover it again. Twitter's value and revenue are 100% advertisement generated. So Mr. Musk has to care about what the people who pay him (advertisers) care about.
Let me give you a quick lesson in how extreme wealth works in an open free market. Elon Musk is worth $269 Billion (on paper) but the bulk of that is not liquid, it's mostly tied up in stock and asset valuation. That means most of his wealth is dependent on how much his assets (in a flowing market) are worth at any given moment. If hypothetically his companies financially collapsed overnight, he would no longer be the "richest man in the world" in fact he would personally lose $266 Billion, meaning he would only be left with $3 billion.
Filthy rich capitalists like Elon are dependent on the confidence of the market to keep them rich, if Elon Musk spends $44 billion dollars on one of the largest tech purchases in history, and then tanks the company (which purging advertisers would do) it will cause confidence in the rest of his business to wain, which will cost him countless billions.
Something else to consider is, that as the sole owner of Twitter, he (Elon) is liable and accountable for anything and everything that happens on his platform. If even one person got hurt by a disgruntled ex-boyfriend posting "revenge porn," an anarchist posting instructions on how to make a bomb, or a racist person advertising a Klan rally meetup, Elon would get sued into oblivion. That is why Twitter had so many rules in the first place.