This settles absolutely nothing.
All this video demonstrates is that Riot accepts conventional wisdom in the absence of any data presented to us. If they made this decision based on compiled K
/win ratios between inputs across thousands of games we aren't presented with it, here. That would "settle" the debate. The only hard data presented to us in this video is a comparison of input lag, and there was no discrepancy between KB+M and Controller. The biggest takeaway there is the massive advantage that a properly calibrated PC has over the consoles. 144Hz Freesync/G-Sync monitors are for the master race who want the best input lag with the highest framerate, but no screen tearing. But that isn't head-to-head hosting hardware.
Previously, we have seen pros tested on both platforms, and I recall one on
Halo 4 (or maybe it was
Halo 5) where the controller pros actually did better at distance than the crossover PC pros. I believe most were imported from other shooters like
CS:GO. The controller pros won the sniper and long-distance battle rifle battles. However, the PC pros enjoyed an even greater advantage, IIRC, in closer quarters where the finer control due to higher DPI mapping favored them. In other words, while even controller pros don't tend to play at the highest sensitivity with their controller, because that isn't ideal for all environments, even if they did, the mouse offers an advantage because the larger physical space on the desktop surface (versus the physical space the joystick can be manipulated in its seat) allows for finer motor control in those situations where speed of rotation often determines the battle, and the speed is so fast that it challenges human motor control to its limits. That's the theory, anyway, and this was some of the only actual hard data I've ever seen properly testing the hypothesis.
Fortnite should undoubtedly be a game that favors KB+M in theory because the majority of encounters at a high level result in hectic, close-quarter building chess matches where the players are constantly whipping around in all directions while following their opponent. Battles are decided by manipulated attempts to get above, below, behind, etc. That's the theory, anyway. When it comes to games where longer kills are more common it isn't clear.
What a silly, disproportionate declaration in response to the data.