i have a feeling thoses who have to "make it a problem" are also not that skilled with k/m and are upset to see balance is good enougth for them not to crush controller users.
And yet most of those players would probably still be much better with the kb/m then most controller players would be without the aim assist. You can't see how someone that would be playing worse than them getting an artificial boost over them would be unfair? It's like the developers said to the lesser skilled mouse players: "Most controller players would be worse than you just because of their choice of input device. So we have given them assists to aiming so that they can now play better than you can by default." There will likely be many more lowly skilled mouse players than there will be controller players in total.