Cue snarky jokes about how you didn't even realize I spent more than FIVE minutes on these things.
No, but seriously, until you actually try to stitch some anime frames together yourself, you don't realize how often these scrolling shots change in a single second. Maybe the shot zooms in slightly, or the cells shift around independent of each other, or the color temperature shifts, or stuff goes blurry and out of focus, or who KNOWS what else. Those image blogs that stitch together big panning shots do more work that you realize... as long as they're working on shows that actually used cells. I guess if you exclusively watch anime that's digitally animated, then this is less of an issue. But then you're probably also a child and I'm not sure how you're here. Look, the point is, more work goes into producing the memes you consume than you realize.