You can't disagree with their revenue breakdowns. That doesn't even make any sense. Apple $365b 2021 revenues had $31b from ads, about 8.5%. Amazon $31b/$470b. Microsoft $10b/$198b.
None of these companies are ad-driven, or have cultures based upon them. Losing the ads division would not irreparably harm the business.
Youtube had 2021 revenues of $28.8b. Google ad revenue for 2021 was $209b. That's what an ad-driven business looks like.
Apple makes a decent penny on ads themselves.
Don’t forget all the technology these companies sell to empower the ad ecosystem.