My previous response was probably a bit snarky. My point was that if this is something that you worked on and you realise that your revenue doubled, then it's probably very easy to justify that to oneself that this is indeed what the users want. After all, you don't hear any negative points, which is what a filter bubble is.

It's not possible to truly know what they want, but it is possible to ask them. Almost all people say they want more personalized content, especially for entertainment. Those who don't want it are free to opt out. The real bubble is around the belief that products with billions of active users somehow thrive without giving users what they want.