The Tetris effect — a well-documented psychological phenomenon where repeated focus on a task rewires perception — serves as the essay's opening frame. Spend enough time playing Tetris and you see tetrominoes in clouds and buildings. Spend enough time inside algorithmic feeds and your entire worldview gets shaped by whatever maximizes engagement metrics, not by what you chose to think about. The indictment is platform-by-platform. YouTube buries cooking tutorials under doomscroll bait about geopolitical crises because distress drives longer sessions. Spotify inserts AI-generated filler between real songs to cut royalty costs to human artists. LinkedIn floods career updates with Microsoft-adjacent thought leadership from strangers. Reddit, once a proxy for authentic user opinion, is now substantially populated by LLMs and state-backed troll operations. Each platform follows the same logic: capture attention, hold it longer than the user intended, monetize the difference. The mechanism is simple but underappreciated. When you open an app and let its algorithm decide what you see, you've outsourced the most consequential decision of your cognitive day — what to focus on — to an entity whose incentive is extraction, not enrichment. The essay frames this as handing someone "the key to your brain," and it's not hyperbole. Attention shapes thought, thought shapes identity, and identity shapes action. The pipeline from "one more video" to measurably altered worldview is shorter than most people assume. The essay's historical contrast lands cleanly. The pre-algorithm internet required intentionality: you maintained bookmarks, visited specific sites for specific purposes, and encountered awful content only by seeking it. Nobody algorithmically inserted far-right propaganda after a pancake recipe. The architecture of discovery was pull-based, not push-based. Offensive material existed but behind deliberate navigation, not recommendation engines optimized for emotional arousal. The proposed antidote is behavioral, not technical. Return to blogs, RSS feeds, and finite content sources where you choose the input. Accept a slower information diet that doesn't refresh on every click. The essay correctly identifies the core friction: algorithmic feeds are infinite and frictionless, while intentional browsing requires discipline. But like any habit, persistence creates its own momentum. The Tetris effect works both ways — sustained focus on chosen material reshapes perception just as powerfully as algorithmic exposure. What the piece doesn't address is the structural asymmetry. Platform incentives won't change because individual users rediscover RSS. The attention economy is worth hundreds of billions annually. Individual opt-out is genuine self-defense, but it doesn't alter the system that will continue extracting from the billions who don't opt out. The essay is a personal manifesto, not a policy prescription, and should be read as such. The underlying dynamic is extractive by design. Platforms capture the value of human attention — the scarcest cognitive resource — and convert it into ad revenue and engagement metrics. The cost is borne entirely by users in the form of degraded agency, manipulated worldviews, and displaced creative labor (AI slop replacing paid artists). The benefit accrues to platform shareholders. This is not a bug in the recommendation algorithm. It is the business model.