So why are you enforcing these echo chambers, google?
Google is an advertising company first, last, and always. You're the product they're selling. Advertisers don't give a damn what you're looking for, only what they want to show you. And they only want to pay for people who might be potential customers to see their ads, and that is why the science of demographics exists. Group people by measurable characteristics that are relevant to how they spend money.
Google isn't doing this to benefit you, the eyeballs they're selling to advertisers. They're doing this because it enforces echo chambers. It concentrates people using their search engine into more saleable demographic groups.
They've tried from day 1 to develop an AI that can accurately provide targeted ads based on what you're interested in, and like all AI, it sucks horribly. So, like most AI companies these days, they're going the mechanical Turk route - if they can't properly sort you into the proper demographic groups for their advertisers (their actual customers), they'll get you to do it for them.
That's how advertising works. They're damned good at it. (And by "damned," I mean "burn in the eternal fires of hell because that's how it works when you sell your soul to the devil.")