Lemmy might not be that advanced yet, but as soon as they get big enough to need ads to pay for bandwidth and storage, soon after they will add algorithms that will show you stuff that pisses you off.
Who is the “they” that is going to implement what you claim? And how are they going to do that, specifically? Lemmy isn’t reddit or youtube, technically. There is no central authority. Lemmy.world can’t change how this technology works just because they might want to start injecting recommendations or ads. That’s the point of this system.