The difference between CSGO and Mount and Blade is that CSGO has guns that inflict a set amount of damage consistently and has no hidden variables or randomness factor in it, so damage can be easily calculated by the player's heads to determine if something is wrong.
Mount and Blade has a somewhat physics calculated based system dependent on animations speed and mouse movement, which is impossible to calculate by yourself in your head.
There is also an issue with progression and feedback for players in Singleplayer. If the player needs to upgrade his Strength stat for 5 levels to bmfibally be able to see his sword kill enemies in 2 hits from a former 3, then the player will feel little developement as if his stats are not improving enough.
It is mych more satisfying to see the number go up from 24->29 than to see an enemy finally go down in 2 hits after upgrading your Strength stat 5 levels.