That $36B doesn't come from a single source. Google Cloud is their single largest non-ad revenue stream, at $3.4B in Q3 (or 7.4% of total revenue). The rest of their non-advertising revenue ($5.5B, or 11.8% of total revenue) is lumped into the "other" category, which implies that they have a lot of smaller revenue streams that add up to a larger figure—not a single hose. So I guess you could maybe call Google Cloud a "hose" at ~$14B per year, but it certainly doesn't print money like their advertising business, and is a relatively small source of revenue for such a large company.
Everything is relative. Back then, for Google's size, their ad business was basically printing money. Today, given their size, Google Cloud and the rest of their non-ad businesses are barely significant—over 80% of their total revenue still comes from ads, and that is only very slowly shifting. Maybe in another 13 years, Google Cloud (or another venture) will catch up to the ad business (though I'm skeptical), but today, that's nowhere near being true, and they still largely depend on that single source of revenue. So are they more diversified than they used to be? Sure. But to say that they have found a second hose that's anywhere near as profitable as advertising is misleading at best, or blatantly false at worst, at least as it stands today.